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Mid-2015 Macbook Pro can't be updated to MacOS 11

I have tried (and failed) numerous times to update my mid-2015 MBP (11,4 w/16GB RAM, >300GB free SSD space) from 10.15.7 to 11. The same thing happens every time: the installer begins the install process, it reboots (as it should), but then, when the progress bar gets to about 10%, the Mac reboots. The process repeats infinitely. I've tried about six different install apps from the App Store and other sources. I'm stumped.

MacBook Pro 15″, macOS 10.15

Posted on Mar 7, 2022 9:02 PM

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Question marked as Top-ranking reply

Posted on Mar 8, 2022 7:35 AM

I would conclude the installer became corrupted somehow.


Your options are to restore that Mac's content from a TM backup created prior to the update, or to reinstall macOS:


Restore your Mac from a backup - Apple Support

How to reinstall macOS - Apple Support

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Mid-2015 Macbook Pro can't be updated to MacOS 11

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