10-06-2017, 03:05 AM
Do not go farther than 10.12.1 if you want to continue using PS5.5! I tried it a couple of months ago and it took me a week to get go back. During that week I was not able to use my PS - at all. It was by luck & chance that I was able to redo 10.12.1. As I have two hard drives on this machine, I did install High Sierra on the other drive, but mainly to see what it does. Otherwise I stay on the early Sierra drive.
michael
michael