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Unable to upgrade to MacOS Big Sur

I've tried upgrading to MacOS Big Sur for at least 20 times in last couple of months. But every time I get the same error. I've never faced this kind of issue on my old Macbook in last 6-7 years.


com.apple.OSInstallerSetup.error error 702


I had contacted Apple support but that didn't helped.

MacBook Pro 16″, macOS 10.15

Posted on Oct 26, 2021 11:17 PM

Reply
Question marked as Top-ranking reply

Posted on Oct 27, 2021 2:50 AM

macOS Big Sur is compatible with these computers


Is there a Third Party Internal Drive been installed on this computer ?


Apple and Apple Computers are very picky about such things especially if there is a Boot ROM required to be flashed to the Drive.

1 reply

Unable to upgrade to MacOS Big Sur

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