Learn what to do if your iMac (21.5-inch, Mid 2010) or iMac (27-inch, Mid 2010) exhibits symptoms that indicate the wrong Mac OS X system software is installed. Symptoms may include: Upon opening iMovie, a message states that iMovie requires a graphics card that is compatible with Quartz Extreme and that one or more of your graphics cards do not support Quartz Extreme.  The computer may not go to sleep when you choose Sleep from the Apple () menu. Difficulty opening or a message may appear when you open the DVD Player application. Only one video resolution available in the Displays System Preferences pane. Using the Grab application (located in the Utilities folder) to take a screenshot may produce only a blank image with a white background. The correct LCD profile may not be present in the Color tab of the Displays System Preferences or under the profile in ColorSync Utility. Compatibility and performance related graphics issues. Compatibility issues with large-format SDXC memory cards. Limited functionality with Magic Trackpad. Both the Mac OS X v10.6.4 Update iMac (Mid 2010) and Mac OS X v10.6.4 update options are advertised for installation via Software Update.   Note: If you attempt to install these updates at the same time, the updates will not work and you will need to restart your computer without installing either of the updates.

The tables in this article list the update or updates you should install on your Intel-based iMac computer. Under each iMac model is the list of updates that should be installed on your computer. If you are unsure if your iMac has a particular update installed, download and open the update installer. If the update is already installed, the installer will alert you to this fact.  

The iTunes Store offers a choice of movie rental and TV rental video formats. The information below will help you choose the format best suited to the device you view your rental on.

You can rent TV Shows from the iTunes Store and watch them on your Mac or Windows computer, iPhone, or iPod touch.1

This document outlines security updates for Apple products.

This document describes the security content of iTunes 10, which can be downloaded and installed via Software Update preferences, or from Apple Downloads. 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. For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key." Where possible, CVE IDs are used to reference the vulnerabilities for further information. To learn about other Security Updates, see "Apple Security Updates".

See the frequently asked questions below to learn more about renting TV episodes from the iTunes Store. Note: TV rentals are currently only available in the US.

See the frequently asked questions below to learn more about renting movies from the iTunes Store.

Learn how to adjust graphics performance on your MacBook Pro (15-inch, Mid 2010) or MacBook Pro (17-inch, Mid 2010).

Certain Mac Pro (Mid 2010) configurations may exhibit a kernel panic or otherwise appear unresponsive after you install Parallels Desktop 5 for Mac virtualization software or after you restart the computer.  You may also experience a kernel panic using the Parallels virtualization engine in 32-bit mode.  

Learn more about the power available via USB on Apple computers and displays and how to use peripheral devices that may require more power than is available through the USB port.

When you connect an Apple Cinema Display (30-inch DVI) to one of the products noted below, you may find that the highest available resolution is 1280 x 800, even though the optimum resolution for the display is 2560 x 1600. The maximum resolution available when this display is connected to a single-link DVI port is 1280 x 800; you must connect the display to a dual-link DVI port to access the higher resolutions available to the display.

Some camcorders that record multiple formats require extra steps to import both formats into iMovie ’09. If you have recorded both AVCHD and MP4 (or iFrame) formats with certain camcorders, iMovie will only recognize the MP4/iFrame video clips in its 'Import' window.

Apple has discontinued support for certain technologically obsolete and vintage products.