Picked up a 2012 MacBook Pro. Tried to boot from an external drive (backup drive from my other computer). Plugged in the drive, booted the computer and two hours later I'm still waiting for the process to finish!
The boot process seems normal at first, but as the progress bar gets completely full, the progress becomes non-linear... and not in a good way. The last 1% takes 99% of the time.
The process does eventually complete and I can log in and operate normally. The external drive is a 1TB SSD and cables and connections are USB3.
Any insight into what's happening?
Asked by Markus
(71 rep)
Jan 30, 2025, 12:45 AM