Game Center Mac Os X

For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.

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Aug 02, 2012 Heute im Test: Mac OS X Mountain Lion - Die Game Center App Name: Mac OS X Mountain Lion Quelle: Mac App Store Preis: 15,99 Euro.

Apr 21, 2014 Hi, I'm trying to use Game Center on Mac OS X but it doesn't appear to work at all. For now I'm using the same code I use for iOS, which is pretty much the exact code from the documentation (authentication via Social.Active.localUser.Authenticate).
Sep 04, 2018 Step 8: Select it if you want to allow to enjoy (install the new game, Access all game setting, Create a group for play game, invite friends for play game). Otherwise, uncheck the option. Step 9: if you Disabled Game Centre access in Mac OS X for guest login, You will see below screen. Log out your account and move another account.

Where possible, CVE IDs are used to reference the vulnerabilities for further information.

To learn about other security updates, see Apple security updates.

OS X El Capitan v10.11

Address Book
Available for: Mac OS X v10.6.8 and later
Impact: A local attacker may be able to inject arbitrary code to processes loading the Address Book framework
Description: An issue existed in Address Book framework's handling of an environment variable. This issue was addressed through improved environment variable handling.
CVE-ID
CVE-2015-5897 : Dan Bastone of Gotham Digital Science

AirScan
Available for: Mac OS X v10.6.8 and later
Impact: An attacker with a privileged network position may be able to extract payload from eSCL packets sent over a secure connection
Description: An issue existed in the processing of eSCL packets. This issue was addressed through improved validation checks.
CVE-ID
CVE-2015-5853 : an anonymous researcher

apache_mod_php
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in PHP
Description: Multiple vulnerabilities existed in PHP versions prior to 5.5.27, including one which may have led to remote code execution. This issue was addressed by updating PHP to version 5.5.27.
CVE-ID
CVE-2014-9425
CVE-2014-9427
CVE-2014-9652
CVE-2014-9705
CVE-2014-9709
CVE-2015-0231
CVE-2015-0232
CVE-2015-0235
CVE-2015-0273
CVE-2015-1351
CVE-2015-1352
CVE-2015-2301
CVE-2015-2305
CVE-2015-2331
CVE-2015-2348
CVE-2015-2783
CVE-2015-2787
CVE-2015-3329
CVE-2015-3330

Apple Online Store Kit
Available for: Mac OS X v10.6.8 and later
Impact: A malicious application may gain access to a user's keychain items
Description: An issue existed in validation of access control lists for iCloud keychain items. This issue was addressed through improved access control list checks.
CVE-ID
CVE-2015-5836 : XiaoFeng Wang of Indiana University, Luyi Xing of Indiana University, Tongxin Li of Peking University, Tongxin Li of Peking University, Xiaolong Bai of Tsinghua University

AppleEvents
Available for: Mac OS X v10.6.8 and later
Impact: A user connected through screen sharing can send Apple Events to a local user's session
Description: An issue existed with Apple Event filtering that allowed some users to send events to other users. This was addressed by improved Apple Event handling.
CVE-ID
CVE-2015-5849 : Jack Lawrence (@_jackhl)

Audio
Available for: Mac OS X v10.6.8 and later
Impact: Playing a malicious audio file may lead to an unexpected application termination
Description: A memory corruption issue existed in the handling of audio files. This issue issue was addressed through improved memory handling.
CVE-ID
CVE-2015-5862 : YoungJin Yoon of Information Security Lab. (Adv.: Prof. Taekyoung Kwon), Yonsei University, Seoul, Korea

bash
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in bash
Description: Multiple vulnerabilities existed in bash versions prior to 3.2 patch level 57. These issues were addressed by updating bash version 3.2 to patch level 57.
CVE-ID
CVE-2014-6277
CVE-2014-7186
CVE-2014-7187
Certificate Trust Policy
Available for: Mac OS X v10.6.8 and later
Impact: Update to the certificate trust policy
Description: The certificate trust policy was updated. The complete list of certificates may be viewed at https://support.apple.com/kb/HT202858.

CFNetwork Cookies
Available for: Mac OS X v10.6.8 and later
Impact: An attacker in a privileged network position can track a user's activity
Description: A cross-domain cookie issue existed in the handling of top level domains. The issue was address through improved restrictions of cookie creation.
CVE-ID
CVE-2015-5885 : Xiaofeng Zheng of Blue Lotus Team, Tsinghua University

CFNetwork FTPProtocol
Available for: Mac OS X v10.6.8 and later
Impact: Malicious FTP servers may be able to cause the client to perform reconnaissance on other hosts
Description: An issue existed in the handling of FTP packets when using the PASV command. This issue was resolved through improved validation.
CVE-ID
CVE-2015-5912 : Amit Klein

CFNetwork HTTPProtocol
Available for: Mac OS X v10.6.8 and later
Impact: A maliciously crafted URL may be able to bypass HSTS and leak sensitive data
Description: A URL parsing vulnerability existed in HSTS handling. This issue was addressed through improved URL parsing.
CVE-ID
CVE-2015-5858 : Xiaofeng Zheng of Blue Lotus Team, Tsinghua University
CFNetwork HTTPProtocol
Available for: Mac OS X v10.6.8 and later
Impact: An attacker with a privileged network position may be able to intercept network traffic
Description: An issue existed in the handling of HSTS preload list entries in Safari private browsing mode. This issue was addressed through improved state handling.
CVE-ID
CVE-2015-5859 : Rosario Giustolisi of University of Luxembourg

CFNetwork HTTPProtocol
Available for: Mac OS X v10.6.8 and later
Impact: A malicious website may be able to track users in Safari private browsing mode
Description: An issue existed in the handling of HSTS state in Safari private browsing mode. This issue was addressed through improved state handling.
CVE-ID
CVE-2015-5860 : Sam Greenhalgh of RadicalResearch Ltd

CFNetwork Proxies
Available for: Mac OS X v10.6.8 and later
Impact: Connecting to a malicious web proxy may set malicious cookies for a website
Description: An issue existed in the handling of proxy connect responses. This issue was addressed by removing the set-cookie header while parsing the connect response.
CVE-ID
CVE-2015-5841 : Xiaofeng Zheng of Blue Lotus Team, Tsinghua University

CFNetwork SSL
Available for: Mac OS X v10.6.8 and later
Impact: An attacker with a privileged network position may intercept SSL/TLS connections
Description: A certificate validation issue existed in NSURL when a certificate changed. This issue was addressed through improved certificate validation.
CVE-ID
CVE-2015-5824 : Timothy J. Wood of The Omni Group

CFNetwork SSL
A gamer’s take on the new Mac mini. Model couldn’t even run that game at all. Are looking to stretch their budget as far as they can, this allows Mac customers to buy a very competent. 63 rows Apr 10, 2020 Can my Mac run it results: We went to great lengths to ensure all tests were performed under the same testing conditions (settings, resolution and, gameplay). All of the games featured here were tested on at least our 3 in-house models below (although several other machines were tested thanks to other members of the Mac Gamer HQ team). Can a mac mini run games download.
Available for: Mac OS X v10.6.8 and later
Impact: An attacker may be able to decrypt data protected by SSL
Description: There are known attacks on the confidentiality of RC4. An attacker could force the use of RC4, even if the server preferred better ciphers, by blocking TLS 1.0 and higher connections until CFNetwork tried SSL 3.0, which only allows RC4. This issue was addressed by removing the fallback to SSL 3.0.

CoreCrypto
Available for: Mac OS X v10.6.8 and later
Impact: An attacker may be able to determine a private key
Description: By observing many signing or decryption attempts, an attacker may have been able to determine the RSA private key. This issue was addressed using improved encryption algorithms.

CoreText
Available for: Mac OS X v10.6.8 and later
Impact: Processing a maliciously crafted font file may lead to arbitrary code execution
Description: A memory corruption issue existed in the processing of font files. This issue was addressed through improved input validation.
CVE-ID
CVE-2015-5874 : John Villamil (@day6reak), Yahoo Pentest Team

Dev Tools
Available for: Mac OS X v10.6.8 and later
Impact: A malicious application may be able to execute arbitrary code with system privileges
Description: A memory corruption issue existed in dyld. This was addressed through improved memory handling.
CVE-ID
CVE-2015-5876 : beist of grayhash

Dev Tools
Available for: Mac OS X v10.6.8 and later
Impact: An application may be able to bypass code signing
Description: An issue existed with validation of the code signature of executables. This issue was addressed through improved bounds checking.
CVE-ID
CVE-2015-5839 : @PanguTeam

Disk Images
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with system privileges
Description: A memory corruption issue existed in DiskImages. This issue was addressed through improved memory handling.
CVE-ID
CVE-2015-5847 : Filippo Bigarella, Luca Todesco

dyld
Available for: Mac OS X v10.6.8 and later
Impact: An application may be able to bypass code signing
Description: An issue existed with validation of the code signature of executables. This issue was addressed through improved bounds checking.
CVE-ID
CVE-2015-5839 : TaiG Jailbreak Team

EFI
Available for: Mac OS X v10.6.8 and later
Impact: A malicious application can prevent some systems from booting
Description: An issue existed with the addresses covered by the protected range register. This issue was fixed by changing the protected range.
CVE-ID
CVE-2015-5900 : Xeno Kovah & Corey Kallenberg from LegbaCore

EFI
Available for: Mac OS X v10.6.8 and later
Impact: A malicious Apple Ethernet Thunderbolt adapter may be able to affect firmware flashing
Description: Apple Ethernet Thunderbolt adapters could modify the host firmware if connected during an EFI update. This issue was addressed by not loading option ROMs during updates.
CVE-ID
CVE-2015-5914 : Trammell Hudson of Two Sigma Investments and snare

Finder
Available for: Mac OS X v10.6.8 and later
Impact: The 'Secure Empty Trash' feature may not securely delete files placed in the Trash
Description: An issue existed in guaranteeing secure deletion of Trash files on some systems, such as those with flash storage. This issue was addressed by removing the 'Secure Empty Trash' option.
CVE-ID
CVE-2015-5901 : Apple

Game Center
Available for: Mac OS X v10.6.8 and later
Impact: A malicious Game Center application may be able to access a player's email address
Description: An issue existed in Game Center in the handling of a player's email. This issue was addressed through improved access restrictions.
CVE-ID
CVE-2015-5855 : Nasser Alnasser

Heimdal
Available for: Mac OS X v10.6.8 and later
Impact: An attacker may be able to replay Kerberos credentials to the SMB server
Description: An authentication issue existed in Kerberos credentials. This issue was addressed through additional validation of credentials using a list of recently seen credentials.
CVE-ID
CVE-2015-5913 : Tarun Chopra of Microsoft Corporation, U.S. and Yu Fan of Microsoft Corporation, China

ICU
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in ICU
Description: Multiple vulnerabilities existed in ICU versions prior to 53.1.0. These issues were addressed by updating ICU to version 55.1.
CVE-ID
CVE-2014-8146 : Marc Deslauriers
CVE-2014-8147 : Marc Deslauriers
CVE-2015-5922 : Mark Brand of Google Project Zero

Install Framework Legacy
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to gain root privileges
Description: A restriction issue existed in the Install private framework containing a privileged executable. This issue was addressed by removing the executable.
CVE-ID
CVE-2015-5888 : Apple

Intel Graphics Driver
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with system privileges
Description: Multiple memory corruption issues existed in the Intel Graphics Driver. These issues were addressed through improved memory handling.
CVE-ID
CVE-2015-5830 : Yuki MIZUNO (@mzyy94)
CVE-2015-5877 : Camillus Gerard Cai

IOAudioFamily
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to determine kernel memory layout
Description: An issue existed in IOAudioFamily that led to the disclosure of kernel memory content. This issue was addressed by permuting kernel pointers.
CVE-ID
CVE-2015-5864 : Luca Todesco

IOGraphics
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: Multiple memory corruption issues existed in the kernel. These issues were addressed through improved memory handling.
CVE-ID
CVE-2015-5871 : Ilja van Sprundel of IOActive
CVE-2015-5872 : Ilja van Sprundel of IOActive
CVE-2015-5873 : Ilja van Sprundel of IOActive
CVE-2015-5890 : Ilja van Sprundel of IOActive

IOGraphics
Available for: Mac OS X v10.6.8 and later
Impact: A malicious application may be able to determine kernel memory layout
Description: An issue existed in IOGraphics which could have led to the disclosure of kernel memory layout. This issue was addressed through improved memory management.
CVE-ID
CVE-2015-5865 : Luca Todesco

IOHIDFamily
Available for: Mac OS X v10.6.8 and later
Impact: A malicious application may be able to execute arbitrary code with system privileges
Description: Multiple memory corruption issues existed in IOHIDFamily. These issues were addressed through improved memory handling.
CVE-ID
CVE-2015-5866 : Apple
CVE-2015-5867 : moony li of Trend Micro

IOStorageFamily
Available for: Mac OS X v10.6.8 and later
Impact: A local attacker may be able to read kernel memory
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Description: A memory initialization issue existed in the kernel. This issue was addressed through improved memory handling.
CVE-ID
CVE-2015-5863 : Ilja van Sprundel of IOActive

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: Multiple memory corruption issues existed in the Kernel. These issues were addressed through improved memory handling.
CVE-ID
CVE-2015-5868 : Cererdlong of Alibaba Mobile Security Team
CVE-2015-5896 : Maxime Villard of m00nbsd
CVE-2015-5903 : CESG

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: A local process can modify other processes without entitlement checks
Description: An issue existed where root processes using the processor_set_tasks API were allowed to retrieve the task ports of other processes. This issue was addressed through additional entitlement checks.
CVE-ID
CVE-2015-5882 : Pedro Vilaça, working from original research by Ming-chieh Pan and Sung-ting Tsai; Jonathan Levin

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: A local attacker may control the value of stack cookies
Description: Multiple weaknesses existed in the generation of user space stack cookies. These issues were addressed through improved generation of stack cookies.
CVE-ID
CVE-2013-3951 : Stefan Esser

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: An attacker may be able to launch denial of service attacks on targeted TCP connections without knowing the correct sequence number
Description: An issue existed in xnu's validation of TCP packet headers. This issue was addressed through improved TCP packet header validation.
CVE-ID
CVE-2015-5879 : Jonathan Looney

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: An attacker in a local LAN segment may disable IPv6 routing
Description: An insufficient validation issue existed in the handling of IPv6 router advertisements that allowed an attacker to set the hop limit to an arbitrary value. This issue was addressed by enforcing a minimum hop limit.
CVE-ID
CVE-2015-5869 : Dennis Spindel Ljungmark

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to determine kernel memory layout
Description: An issue existed that led to the disclosure of kernel memory layout. This was addressed through improved initialization of kernel memory structures.
CVE-ID
CVE-2015-5842 : beist of grayhash

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to determine kernel memory layout
Description: An issue existed in debugging interfaces that led to the disclosure of memory content. This issue was addressed by sanitizing output from debugging interfaces.
CVE-ID
CVE-2015-5870 : Apple

Kernel
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to cause a system denial of service
Description: A state management issue existed in debugging functionality. This issue was addressed through improved validation.
CVE-ID
CVE-2015-5902 : Sergi Alvarez (pancake) of NowSecure Research Team

libc
Available for: Mac OS X v10.6.8 and later
Impact: A remote attacker may be able to cause arbitrary code execution
Description: A memory corruption issue existed in the fflush function. This issue was addressed through improved memory handling.
CVE-ID
CVE-2014-8611 : Adrian Chadd and Alfred Perlstein of Norse Corporation

libpthread
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue existed in the kernel. This issue was addressed through improved memory handling.
CVE-ID
CVE-2015-5899 : Lufeng Li of Qihoo 360 Vulcan Team

libxpc
Available for: Mac OS X v10.6.8 and later
Impact: Many SSH connections could cause a denial of service
Description: launchd had no limit on the number of processes that could be started by a network connection. This issue was addressed by limiting the number of SSH processes to 40.
CVE-ID
CVE-2015-5881 : Apple

Login Window
Available for: Mac OS X v10.6.8 and later
Impact: The screen lock may not engage after the specified time period
Description: An issue existed with captured display locking. The issue was addressed through improved lock handling.
CVE-ID
CVE-2015-5833 : Carlos Moreira, Rainer Dorau of rainer dorau informationsdesign, Chris Nehren, Kai Takac, Hans Douma, Toni Vaahtera, and Jon Hall of Asynchrony
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lukemftpd
Available for: Mac OS X v10.6.8 and later
Impact: A remote attacker may be able to deny service to the FTP server
Description: A glob-processing issue existed in tnftpd. This issue was addressed through improved glob validation.
CVE-ID
CVE-2015-5917 : Maksymilian Arciemowicz of cxsecurity.com

Mail
Available for: Mac OS X v10.6.8 and later
Impact: Printing an email may leak sensitive user information
Description: An issue existed in Mail which bypassed user preferences when printing an email. This issue was addressed through improved user preference enforcement.
CVE-ID
CVE-2015-5881 : Owen DeLong of Akamai Technologies, Noritaka Kamiya, Dennis Klein from Eschenburg, Germany, Jeff Hammett of Systim Technology Partners

Mail
Available for: Mac OS X v10.6.8 and later
Impact: An attacker in a privileged network position may be able to intercept attachments of S/MIME-encrypted e-mail sent via Mail Drop
Description: An issue existed in handling encryption parameters for large email attachments sent via Mail Drop. The issue is addressed by no longer offering Mail Drop when sending an encrypted e-mail.
CVE-ID
CVE-2015-5884 : John McCombs of Integrated Mapping Ltd

Multipeer Connectivity
Available for: Mac OS X v10.6.8 and later
Impact: A local attacker may be able to observe unprotected multipeer data
Description: An issue existed in convenience initializer handling in which encryption could be actively downgraded to a non-encrypted session. This issue was addressed by changing the convenience initializer to require encryption.
CVE-ID
CVE-2015-5851 : Alban Diquet (@nabla_c0d3) of Data Theorem

NetworkExtension
Available for: Mac OS X v10.6.8 and later
Impact: A malicious application may be able to determine kernel memory layout
Description: An uninitialized memory issue in the kernel led to the disclosure of kernel memory content. This issue was addressed through improved memory initialization.
CVE-ID
CVE-2015-5831 : Maxime Villard of m00nbsd

Notes
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to leak sensitive user information
Description: An issue existed in parsing links in the Notes application. This issue was addressed through improved input validation.
CVE-ID
CVE-2015-5878 : Craig Young of Tripwire VERT, an anonymous researcher

Notes
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to leak sensitive user information
Description: A cross-site scripting issue existed in parsing text by the Notes application. This issue was addressed through improved input validation.
CVE-ID
CVE-2015-5875 : xisigr of Tencent's Xuanwu LAB (www.tencent.com)

OpenSSH
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in OpenSSH
Description: Multiple vulnerabilities existed in OpenSSH versions prior to 6.9. These issues were addressed by updating OpenSSH to version 6.9.
CVE-ID
CVE-2014-2532

OpenSSL
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in OpenSSL
Description: Multiple vulnerabilities existed in OpenSSL versions prior to 0.9.8zg. These were addressed by updating OpenSSL to version 0.9.8zg.
CVE-ID
CVE-2015-0286
CVE-2015-0287
procmail
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in procmail
Description: Multiple vulnerabilities existed in procmail versions prior to 3.22. These issues were addressed by removing procmail.
CVE-ID
CVE-2014-3618

remote_cmds
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with root privileges
Description: An issue existed in the usage of environment variables by the rsh binary. This issue was addressed by dropping setuid privileges from the rsh binary.
CVE-ID
CVE-2015-5889 : Philip Pettersson

removefile
Available for: Mac OS X v10.6.8 and later
Impact: Processing malicious data may lead to unexpected application termination
Description: An overflow fault existed in the checkint division routines. This issue was addressed with improved division routines.
CVE-ID
CVE-2015-5840 : an anonymous researcher

Ruby
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in Ruby
Description: Multiple vulnerabilities existed in Ruby versions prior to 2.0.0p645. These were addressed by updating Ruby to version 2.0.0p645.
CVE-ID
CVE-2014-8080
CVE-2014-8090
CVE-2015-1855

Security
Available for: Mac OS X v10.6.8 and later
Impact: The lock state of the keychain may be incorrectly displayed to the user
Description: A state management issue existed in the way keychain lock status was tracked. This issue was addressed through improved state management.
CVE-ID
CVE-2015-5915 : Peter Walz of University of Minnesota, David Ephron, Eric E. Lawrence, Apple

Security
Available for: Mac OS X v10.6.8 and later
Impact: A trust evaluation configured to require revocation checking may succeed even if revocation checking fails
Description: The kSecRevocationRequirePositiveResponse flag was specified but not implemented. This issue was addressed by implementing the flag.
CVE-ID
CVE-2015-5894 : Hannes Oud of kWallet GmbH

Security
Available for: Mac OS X v10.6.8 and later
Impact: A remote server may prompt for a certificate before identifying itself
Description: Secure Transport accepted the CertificateRequest message before the ServerKeyExchange message. This issue was addressed by requiring the ServerKeyExchange first.
CVE-ID
CVE-2015-5887 : Benjamin Beurdouche, Karthikeyan Bhargavan, Antoine Delignat-Lavaud, Alfredo Pironti, and Jean Karim Zinzindohoue of INRIA Paris-Rocquencourt, and Cedric Fournet and Markulf Kohlweiss of Microsoft Research, Pierre-Yves Strub of IMDEA Software Institute

SMB
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue existed in the kernel. This issue was addressed through improved memory handling.
CVE-ID
CVE-2015-5891 : Ilja van Sprundel of IOActive

SMB
Available for: Mac OS X v10.6.8 and later
Impact: A local user may be able to determine kernel memory layout
Description: An issue existed in SMBClient that led to the disclosure of kernel memory content. This issue was addressed through improved bounds checking.
CVE-ID
CVE-2015-5893 : Ilja van Sprundel of IOActive

SQLite
Available for: Mac OS X v10.6.8 and later
Impact: Multiple vulnerabilities in SQLite v3.8.5
Description: Multiple vulnerabilities existed in SQLite v3.8.5. These issues were addressed by updating SQLite to version 3.8.10.2.
CVE-ID
CVE-2015-3414
CVE-2015-3415
CVE-2015-3416

Telephony
Available for: Mac OS X v10.6.8 and later
Impact: A local attacker can place phone calls without the user's knowledge when using Continuity
Description: An issue existed in the authorization checks for placing phone calls. This issue was addressed through improved authorization checks.
CVE-ID
CVE-2015-3785 : Dan Bastone of Gotham Digital Science

Terminal
Available for: Mac OS X v10.6.8 and later
Impact: Maliciously crafted text could mislead the user in Terminal
Description: Terminal did not handle bidirectional override characters in the same way when displaying text and when selecting text. This issue was addressed by suppressing bidirectional override characters in Terminal.
CVE-ID
CVE-2015-5883 : Lukas Schauer (@lukas2511)

tidy
Available for: Mac OS X v10.6.8 and later
Impact: Visiting a maliciously crafted website may lead to arbitrary code execution
Description: Multiple memory corruption issues existed in tidy. These issues were addressed through improved memory handling.
CVE-ID
CVE-2015-5522 : Fernando Muñoz of NULLGroup.com
CVE-2015-5523 : Fernando Muñoz of NULLGroup.com

Time Machine
Available for: Mac OS X v10.6.8 and later
Impact: A local attacker may gain access to keychain items
Description: An issue existed in backups by the Time Machine framework. This issue was addressed through improved coverage of Time Machine backups.
CVE-ID
CVE-2015-5854 : Jonas Magazinius of Assured AB

Note: OS X El Capitan v10.11 includes the security content of Safari 9.

If you've been using Apple's Game Center for a while, you've undoubtedly noticed the drastic changes the service underwent a few years ago. The gaming social network has been dramatically reduced in size and scope, nixing the app and focusing on the third-party app integration options, instead.

What happened to Game Center?

Before iOS 10, Game Center was Apple's gaming-themed social network that connected through your iCloud account: It was built around a standalone app that let you add friends, challenge their high scores, and invite them to play games. It may never have been a great social network — but it was there.

When Apple axed the app as part of its 2016 software update, the company turned Game Center into an optional integration service for third-party games. Unfortunately, in doing so, Apple crippled a lot of Game Center's functionality.

How can I tell if a game supports Game Center?

Unfortunately, there's no badge on an app's download page to highlight whether or not it supports Game Center: You'll have to download it to confirm. If a game has an iMessage app, however, it definitely supports Game Center.

Open the game after you've downloaded it.
If Game Center is supported, you'll see the Game Center banner appear at the top of the screen.
You'll also be able to access leaderboards and the like by finding the Game Center button. (It looks different in every app.)

How to view your achievements

If you've been collecting achievements while playing a game, you should be able to view all your achievements from within the app.

Launch a game from your Home screen.
Tap the achievements button. Each game will have a different location and some may use a different icon; many games use a trophy icon for achievements.
Tap on the achievements tab.

NOTE: Not all games will have achievements; it's up to the developer to include this feature in the game.

How to view leaderboards

If a game offers leaderboards, you'll be able to check those inside the app in question.

Launch a game from your Home screen.
Tap the achievements button. Each game will have a different location and some may use a different icon; many games use a trophy icon for achievements.
Tap on the leaderboards tab.

How to change your nickname in Game Center in iOS 13

Apple occasionally offers updates to iOS, watchOS, tvOS, and macOS as closed developer previews or public betas for iPhone, iPad, Apple TV and Mac (sadly, no public beta for the Apple Watch). While the betas contain new features, they also contain pre-release bugs that can prevent the normal use of your iPhone, iPad, Apple Watch, Apple TV, or Mac, and are not intended for everyday use on a primary device. That's why we strongly recommend staying away from developer previews unless you need them for software development, and using the public betas with caution. If you depend on your devices, wait for the final release.

Launch the Settings app from your Home screen.
Tap Game Center.
Tap your nickname.
Type in your new nickname.
Tap Done.

How to add and remove friends from Game Center

You can see your friends in Settings under Game Center and can delete them individually, but you can't add them manually.

How to add friends

Adding friends is managed on an individual game-by-game basis, through iMessage. Your game may or may not support this feature.

Find your game's Add Friends button, if it exists or is supported, and tap it.
Send an invite to your friend via iMessage inviting them to play the game.

More likely, you'll see an option to invite friends via Facebook integration; this doesn't connect to Game Center, but offers game developers an alternate way to connect friends together to play a game.

How to delete friends

You can manually delete friends individually from the Settings app.

Launch Settings on your iPhone or iPad.
Scroll down and tap on Game Center.
Tap on the [X number of] Friends.
Tap the red minus button on the friend you want to delete.
Tap the red delete button when it appears.

How to delete friends in iOS 13

Launch the Settings app on your Home screen.
Tap Game Center.
Tap Friends under your Game Center Profile.
Swipe to the left on the name of the friend you want to remove to reveal hidden actions.
Tap Remove.
Tap Unfriend to confirm. Remember that this action cannot be undone.

How to invite or challenge someone to play a Game Center game

If your game supports multiplayer invitations or challenges, you can challenge your friends to beat your achievements or high scores.

How to invite someone to play a multiplayer game

Note: Your game may or may not support this feature; multiplayer invitations are implemented on a game-by-game basis and Apple offers no concrete list for apps that support Game Center.

Find your game's Invite button, if it exists or is supported, and tap it.
Send an invite to your friend via iMessage inviting them to play the game.

How to challenge a friend

Note: Your game may or may not support this feature. In addition, challenges only work if the person you wish to challenge is already on your friends list — you can't challenge anyone in your Contacts list, for instance.

Launch a game from your Home screen.
Tap the achievements button. Each game will have a different location and some may use a different icon; many games use a trophy icon for achievements.

From here, you have one of two options:

Tap on the leaderboards tab and tap your high score in your friends list, then select Challenge.
Tap on the achievements tab, select an achievement, and then tap Challenge.

How to play a game in iMessage

Some games offer built-in iMessage apps, which let you play the game directly in your iMessage conversation. To check and see whether your game supports iMessage, simply look it up in the App Store — games that support the feature will have an 'Offers iMessage App' banner under their app icon, and you can see what form that game takes by looking at their included iMessage screenshots.

To start a new game, do the following:

Open a conversation where you want to have a game.
Tap the right arrow button to open up the App Drawer.
Select the app icon.
Swipe through the various iMessage apps until you find the game you want to play.
Tap on it, and press Start Game.

How to disable game invites to nearby players

By default, if you're playing the same multiplayer game as someone close to you, you can send invites to them over Wi-Fi or Bluetooth. Of course, this only works if the game you're playing supports game invites. You can turn this feature off in your settings.

Launch the Settings app from your Home screen.
Tap Game Center.
Tap the Nearby Players switch. If the switch is green, that means the feature is active, and if the switch is white, that means the feature has been disabled.

You can turn the nearby players feature on again at any time by following the same steps listed above.

How to record your gameplay on iPhone and iPad

Apple's Game Center not only gives third-party apps leaderboards and multiplayer options, but it also offers gameplay recording features. If the app you use supports Game Center's ReplayKit, you can record your screen and microphone during gameplay to share it with friends, or stream it online to make some cool 'Let's Plays.'

How to switch between Game Center accounts on Apple TV

How do you switch Game Center accounts on Apple TV? Easy, just use Settings!

A lot of the games you can play on the iPhone and iPad are also available on Apple TV, and much like gaming on iOS, tvOS can track your progress in games that support Game Center. If you share Apple TV with other members of the household, though, you may want to switch between Game Center accounts, depending on who is playing at any given time.

Questions?

Anything you still want to know about Game Center? Leave us a comment below!

Updated June 2019: Updated for iOS 13 beta.

Game Center: The Ultimate Guide

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