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Those wanting to install two Mac OS systems on the same computer: don’t install in two volumes on same APFS container. Every time I boot in High Sierra it’s corrupting the Big Sur volume, & I had to reinstall. Try installing on two separate partitions. #BigSur #macOS @Apple
@JeffBenjam @9to5mac I tried your method. All went well for 2 weeks as long as I didn’t try to boot from High Sierra. Yesterday I did that. HS gave some error message which people have reported. Sadly when I booted back into Big Sur got a message that I need to reinstall the OS.
I thought may be an accident reinstalled Big Sur and was up and running after the installation. But when I booted to High Sierra and tried to boot back, same error and had to reinstall Big Sur again.
