 | I was going to sell my late 2015 intel iMac but the buyer installed a firmware hack to upgrade the is from Monterey to Catalina. The buyer dropped their price so I took the Mac back. I have the Mac back in my possession and want to remove what they have done Booting internet recovery will erase the Fusion Drive but I need to revert the base system. (macOS Fails to install) Thank you in advance. [link] [comments] |
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