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Well, i have a little problem… I borrowed a Mac Mini from a friend to do some tests with an Maudio 2626 firewire audio interface. It has MacOS 10.12.6 installed, but the drivers for the audio interface were not compatible, so i had to install MacOS 10.7 (lion) to make it work. So i removed the original HDD from the Mac Mini, installed a fresh SSD, installed MacOS lion into it, and the drivers ran perfectly. Ok, job done, time to get to the state it was before. I removed the new SSD, replaced with the good old original HDD, whitch has MacOS 10.12.6 installed, and it doesn’t run. When i try to boot it, i get this prohibitory symbol and then enters recovery mode. I tried repairing the disk with the provided tools, it appears like it’s done successfully, but it keeps saying that it “could not create the initialization caches on auxiliary partition”. Can anyone help?
Ah! Likely a simple problem! Restart the system and press the Option key to get to the Startup Manager so you can select the original drive. Once it has started you will need to go into the Startup Drive preference setting resetting it let it reboot to make sure it’s set. Reference Mac startup key combinations
