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ssls6

macrumors 6502a
Original poster
Feb 7, 2013
600
187
Is it possible to upgrade from Mojave to Sequoia? I have a 2014 Mac mini that I use as a media server running Mojave. I didn't feel like upgrading my SoftRAID software so I stuck with Mojave. Now with the tariffs, I bought a used M1 Mac mini 2020 with 16gig ram and 512gig storage to replace it. When setting up the new Mac mini, I want to run Sequoia but restore from my Mojave clone. I don't run much software other than Plex and SoftRAID. I have never jumped this many revisions of macOS.

Any comments appreciated.
 
When setting up the new Mac mini, I want to run Sequoia but restore from my Mojave clone.
By “restore” you must mean you wish to migrate user data as Mojave will not run on M1. Make Time Machine backup of old mini and use Migration Assistant during initial set up of new mini.
 
I am not sure if this applies for current time, but I have encountered a nasty problem when updating straight from Mojave to Monterey. I suspect the root of the problem in change of volume structure when updating from Mojave to Catalina and then to Big Sur. This produced an unbootable machine. After that I have always first updated to Catalina and then straight to that new release which suites you.

It might not be same for all similar cases - this machine had filevault enabled and maybe it would not end up with same result when filevault is not enabled (volume structure and filevault logic is different between Mojave and Catalina and it is different between Catalina and Big Sur+ as well).

Migration assistant data restore after Big Sur+ clean install should work from Mojave-made backup
 
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I ended up just rebuilding my media server from scratch. Just wan't comfortable with upgrading across CPU architectures.
 
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