I've read some posts here or there about slow boots with High Sierra but nothing that seems to really point out what is going on with High Sierra. That ***** compared to this newest machine still running Sierra that boots in no more than 20 seconds and that includes what FileVault needs to do to prepare the files for viewing. ![]() When I installed 10.13.2 on the 2013 machine and with FileVault enabled and with the drive having had the time required to encrypt all the files (took a couple of days), I now boot this older machine in about 60 seconds. I also turned on FileVault because my newest machine, a 2016 TouchBar MB Pro already has FileVault turned on so I wanted to compare something closer between performance of the 2013 machine with FileVault AND High Sierra while the 2016 machine has FileVault and (still) macOS 10.12.6 Sierra. I then waited until 10.13.2 came out and, since that machine is only used for testing things like this, I gave it a go again. That was so ugly that I reinstalled (from a clone), 10.12.6 Sierra and it was fast to boot again. It took that machine from one that previously booted in about 10 seconds to one that took 90 seconds. On a MacBook Pro I own that was new in 2013, I installed Mac OS 10.13 High Sierra some time after it came out.
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