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Learn how to install additional memory or replace the memory in your iMac (Mid 2010) or iMac (Late 2009) computer.

Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues. Unsupported third-party add-ons may add features to Safari or change its appearance. If you use unsupported third-party add-ons you may encounter issues such as these: Safari quits unexpectedly Safari runs slowly Safari is unable to download files Other unexpected behavior Note: This article does not apply to Internet Plug-Ins such as QuickTime, Java and Adobe Flash. It also does not apply to Safari Extensions.

Learn which kinds of memory to use with your iMac (21.5-inch, Mid 2010) and iMac (27-inch, Mid 2010).

With Target Display mode, you can use your 27-inch iMac with Mac OS X as an external display. Connect any computer or other device with a Mini DisplayPort to your 27-inch iMac using a Mini DisplayPort to Mini DisplayPort cable or using a converter that converts other electrical, video, and audio protocols from another source device to Mini DisplayPort compliant signals.  (Cables and converters available separately.)

Learn about the types of random access memory (RAM) and video memory (VRAM) used in iMac computers. For specific instructions on installing memory, refer to the linked documents.

To learn where the serial number is located on your iMac, first identify which model of iMac you have. Use the information in these linked documents to find your iMac's serial number.

Server Admin Tools 10.6.4 contain remote administration tools, documentation, and utilities that you can install on a Mac other than your server. This version requires Mac OS X v10.6.4 and is required to administer Mac OS X Server v10.6.4 remotely. The Server Admin Tools 10.6.4 are available as an automatic Software Update for Macs running Mac OS X v10.6.4 with version 10.6 or later of the Server Admin Tools already installed, and as a manual download from Apple Support Downloads. Important: If you have moved any of the Server Admin Tools out of their original locations (inside /Applications/Server/), the update may continue to appear in Software Update even after you have installed it. Return the Server Admin Tools to their original location before using Software Update, or remove any duplicate copies of the Server Admin Tools.

Your iPhone, iPad, or iPod touch may not always update when you read, delete, reply to, or move messages in MobileMe Mail, or in an email application on your Mac or PC.

Learn about the key placement and functionality on MacBook (Late 2007) and later, MacBook Pro (Early 2008) and later, and MacBook Air computers.

This article explains when you should expect to see the lock icon when browsing webpages with encrypted content using Safari 5.