Apple has warned macOS Catalina users that installing the macOS Monterey or Big Sur system can cause the machine to start an infinite reboot process, also known as boot loop. This occurs with those who use the old system on a separate volume with FileVault, identified as responsible for the bug that prevents the use of the computer.
The warning was given in the macOS Monterey 12.3 release notes and made this important note for anyone who has to deal with two or more versions of Apple’s system. According to the Cupertino giant, a very specific set of circumstances can cause machines to not boot properly.
If your Mac has the Catalina version installed and you try to put Monterey 12.3 beta or macOS Big Sur 11.6.4 beta on a volume with FileVault, you are most likely affected by the flaw. It is unclear if other versions would also be affected, but these were the conditions mentioned by the company.
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This would occur because the system tries to boot to the other volume, which causes this cycle to repeat indefinitely. In some cases, people were even able to access the machine, but only when booting from macOS Monterey.
When does the fix for the macOS restart bug arrive?
Until the final solution arrives, it is recommended to avoid installing unstable systems on your official work or study computer, as an eventual loss of data would cause damage. Remember to always keep a backup of your information on iCloud and no sensitive files on your hard drive.
Because it is a beta version of macOS Monterey and Big Sur, failures like this are common to occur — which is precisely why testers use separate partitions to install these software. Apple is likely to fix the bug in the next stable update, but there is no set date.
