About Performance Update 1.0

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This update addresses intermittent hard drive related pauses reported by a small number of customers. Learn how to apply the Performance Update 1.0 to an Intel-based Macintosh computer.

Mac OS X v10.6 Snow Leopard: How to Erase and Install

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Use this procedure to restore to the factory settings and the software that originally came with your computer by using the DVDs that shipped with it.  Refer to How to 'Erase and Install' on MacBook, MacBook Pro, MacBook Air, and Mac Pro computers (Late 2008 and later) for Mac OS X v10.5 Leopard instructions. Important: If you have a MacBook Air, you must have a MacBook Air SuperDrive to complete this procedure.

Wireless input devices: Bluetooth frequently asked questions

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Some Mac computers come with a wireless mouse and keyboard as the default configuration.  Most Mac computers work with wireless input devices that use Bluetooth technology.

iMac (27-inch, Late 2009): Display flickers and the 27-inch iMac Graphics Firmware Update 1.0

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The 27-inch iMac Graphics Firmware Update applies to the graphics firmware on ATI Radeon HD 4670 and 4850 graphics cards to address issues that may cause image corruption or the display to flicker.

Using a 27-inch iMac as an external display

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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.)

iMac (Late 2009): Installing or replacing memory

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

About Bluetooth Update 1.0 for Windows

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This update improves the performance of the Apple Bluetooth devices while running Microsoft Windows XP and Windows Vista on the the iMac (21.5-inch, Late 2009) and iMac (27-inch, Late 2009) computers using Boot Camp.

Graphics Firmware Update 1.0: iMac and Mac Pro compatibility with Windows 7

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Download and install the Graphics Firmware Update 1.0 if you run Microsoft Windows 7 using Boot Camp on your iMac (with NVIDIA GeForce 7300 or 7600 GT) or Mac Pro (with NVIDIA GeForce 7300 GT or Quadro FX 4500) computer. Important: Install this update before you install Windows 7 on your computer.

iMac (27-inch, Late 2009): Display flickers and the 27-inch iMac Display Firmware Update 1.0

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The 27-inch iMac Display Firmware Update 1.0 updates the display firmware on 27-inch iMac computers to address issues that may cause intermittent display flickering.

iMac (Late 2009): Using the correct Mac OS X system software

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You may notice that iMac (21.5-inch, Late 2009), iMac (27-inch, Late 2009), and iMac (27-inch, Quad Core, Late 2009) computers sometimes exhibit symptoms that indicate the wrong Mac OS X system software is installed.  These symptoms can include: Graphic anomalies such as visual corruption on startup or corruption that appears to follow the mouse pointer. The computer may report that AirPort or Bluetooth isn't currently available. The Mouse System Preference pane does not display the Magic Mouse or does not utilize some of the functionality that it supports. Brief graphic distortion when powering down the iMac. You may also observe other anomalies which are indicative of having the wrong Mac OS X system software installed on iMac (21.5-inch, Late 2009), iMac (27-inch, Late 2009), and iMac (27-inch, Quad Core, Late 2009) computers.

iMac (27-inch, Quad Core, Late 2009): Startup keys may not work with the wireless keyboard

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Some USB devices—such as USB storage devices—can cause the computer to ignore some startup key combinations or keystrokes when you use a wireless keyboard.

iMac (Late 2009) Evaluating normal noises

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The iMac (Late 2009), like most computers, has components that may generate small amounts of noise during use. In most cases these noises are normal and do not require repair or further evaluation.

iMac (27-inch, Quad Core, Late 2009): Migrating from Mac OS X v10.5 Leopard with wireless migration

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In some situations, an alert message that says "There might be a problem with your network" may appear when you migrate from Mac OS X v10.5 Leopard using a wireless connection.