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OS X Mountain Lion: "We could not complete your purchase. OS X Mountain Lion is not compatible with this computer" alert when installing

Symptoms

When attempting to install OS X Mountain Lion via the Mac App Store, this alert may appear:

"We could not complete your purchase. OS X Mountain Lion is not compatible with this computer"

 

This can happen:

  • When attempting to download OS X Mountain Lion from the Mac App Store on certain Macs that shipped with OS X Mountain Lion preinstalled
  • If your Mac does not meet the system requirements for OS X Mountain Lion

Resolution

Last Modified: Jul 5, 2013
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  • Last Modified: Jul 5, 2013
  • Article: TS4541
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