Having used system settings to update my MacBook Pro 2016 I tried it on the Mac Pro 6,1 I recently acquired and it fooked it so put it back onto 15.3 using the original flash drive. So to update to 15.3.1 do I have to make a whole new macOS installer and then what? as the EFI boot is on the computer is it quicker than doing it the first time? Or is it the same process as if you’re doing it for the very first time? TIA
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