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Late 2012 27inch iMac Running Mac OS Big Sur Flawlessly Thanks to u/BenSova Big Sur Patcher : r/BigSurPatcher
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My Late 2012, 21.5 iMac, Opencore patched and running Mac OS Ventura. (1tb Apple HDD was replaced with a 500gb Samsung 870 EVO SSD) : r/mac
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How to Install macOS Ventura or Sonoma on Unsupported Macs, for Security Improvements - The Mac Security Blog
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