I decided to test some performance differences between High Sierra and my new Mojave install and booted into my High Sierra backup, unfortunately after this it no longer boots to Mojave, it just goes to a black screen! I tried a PRAM reset but same, If I try and repair the Mojave drive via disk utility in High Sierra it shows a lot of errors, safe mode is the same boot problem. So I thought a reinstall of OSX or a Time Machine recovery, but how do I do that as to get to the recovery boot up I have to use my old GPU, and that won’t install Mojave.
Is it a case of wiping my Mojave drive, installing High Sierra then booting with my Mojave compatible GPU , upgrading to Mojave then restoring with Time machine? Seems to me running Mojave on a Mac Pro 5.1 with a GPU with no boot screen holds a few problems when restoring, or am I missing something?
Is it a case of wiping my Mojave drive, installing High Sierra then booting with my Mojave compatible GPU , upgrading to Mojave then restoring with Time machine? Seems to me running Mojave on a Mac Pro 5.1 with a GPU with no boot screen holds a few problems when restoring, or am I missing something?