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I have an iMac mid 2011 with Maverick which i have replaced with a iMac retina 27" with Yosemite Preinstalled. I did a Migration Assistant to transfer files from old to new mac. Now i want to downgrade the new machine from Yosemite to Mavericks. Can i use a TM backup from the old machine made AFTER the migration, to do this? (Using the OS X Utilities restoring from TM Backup).

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Doubtful, the minimum OS for the 27" iMac is 10.10. You can lay the TM backup down on the iMac, but it will most likely panic on the subsequent reboot.

  • Ok. Is there another way to downgrade in my situation? – Jan2015 Apr 6 '15 at 21:57
  • No, the newer hardware simply won't support the older OS. – Patrick McMahon Apr 6 '15 at 21:58

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