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Hey everyone, as the title says, when I try and install MacOS High Sierra it only pops up with this message. Backstory: I previously installed Catlina on this computer with dosdude1 patcher. I can’t find any info online with this kind of pop up message.
Dear iFixit gods @danj and @mayer please help.
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This could be an issue with the system firmware. The OS installer maybe because the firmware level is not recognized by the installer.
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You had Catalina on it, why are you trying to go to high Sierra
David bellows さんによる
If you have wiped your drive clean it should work if not there’s your issue it recognizes newer software in which case you’ll have to swap the drive (if you don’t wanna lose data) erase it using disk utility shut down your Mac and start holding command + shift + R which will put you in internet recovery you’ll probably get something like mountain lion, than install high Sierra from Mac OS mountain lion
David bellows さんによる