Chosen Solution
I have a MacBook Pro, Mid 2012, running Mac OS 10.12.6. I also have a bootable external ssd with Mac OS 10.6.8 on it. My older Mid-2010 MacBook Pro can boot from the external drive ok, but I cannot seem to boot from it on the Mid-2012 MBPro. Any advice? Would it work if I put it on a partition on the Mid-2012 MBP? Or would it work if I installed the ssd as a second drive in it? Thanks so much for reading this and for any help offered!
Won’t boot from 10.6.8 A Mac will not boot from a lessor system than what it shipped with Pre-Installed MacOS:X 10.7.3 (11D2097)Maximum MacOS:Current* UPDATE 2/11/19 If you don’t have the original system installation disk, do an Internet Recovery. Here’s how: https://www.idownloadblog.com/2016/02/25…
