iMac (Mid 2010): Using the correct Mac OS X system software

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.
  • Dock magnification appears not to move smoothly or moves more slowly than expected.
  • Dashboard and Expose may open more slowly than expected or may not smoothly transition.
  • Image files may not open correctly using the Preview application.
  • 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.

iMac (Mid 2010) computers originally shipped with one of these builds:

  • Mac OS X v10.6.3 Build 10D2322a
  • Mac OS X v10.6.4 Build 10F2056
  • Mac OS X v10.6.4 Build 10F2061

If you must reinstall your system software, use only the DVD included in the box with your computer. To reinstall your operating system, insert the DVD and follow the onscreen instructions to perform an Upgrade Install of your original operating system version. After that, you can download and install the latest operating system version available for your computer by choosing Software Update from the Apple () menu.

  • Do not attempt to use a Mac OS X v10.6.0 or v10.6.3 Snow Leopard Retail DVD.  
  • Do not use DVDs that have earlier versions of the Mac OS X operating system. 
  • Do not attempt to use a Mac OS X DVD intended for product other than iMac (21.5-inch, Mid 2010) or iMac (27-inch, Mid 2010). 
  • Do not install a version of the Mac OS X v10.6.4 update that does not have iMac (Mid 2010) in the name.

After installing Mac OS X v10.6.4 Update iMac (Mid 2010), the computer will have Mac OS X v10.6.4 Build 10F2056.

Learn more

To find your build number:

  1. Choose About this Mac from the Apple () menu in the upper left menu bar.
  2. Click on version number direction below the text "Mac OS X" to reveal the build number.

Learn more about the Mac OS X versions (builds) included with your Intel-based Mac.

Learn more about the Mac OS X v10.6.4 Update iMac (Mid 2010).

Learn about using the correct system software for the late 2009 models of iMac: iMac (21.5-inch, Late 2009), iMac (27-inch, Late 2009), or iMac (27-inch, Quad Core, Late 2009).

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