Does it make sense to force install HS on HFS+ and SSD if: - I want normal boot speed - I want normal wake from sleep - I want normal app launch time speed ...by normal I mean same as Sierra, at least. My boot ROM is MP51.0089.B00 as I have already updated the firmware on my Mac Pro 5,1 (mid-2012). I have already installed High Sierra twice using APFS, when it came out last fall (10.13), and about a month ago (10.13.6). Both times I ended up reverting to Sierra because there was a decrease in performance. Not that going to HS is a requiremennt for me, but with Mojave around the corner, I'd like to keep my system more current before I upgrade my GPU and make the jump to Mojave later.