For those upgrading to macOS High Sierra. On my Late 2012 Mac mini, the first attempt failed with it getting all the way through and then getting a kernel panic after trying to log in to High Sierra. After failed attempts at debugging it, I restored from Time Machine to start the process again, this time without File Vault. This succeeded and my guess on this is that FileVault was problematic. I have one more Mac computer to do, and I will decrypt FileVault before the upgrade. The macOS High Sierra upgrade is very time consuming, I am about two days into the upgrade and the FileVault re-encryption is still estimating another day. I have only tested the main applications I use on a day to day basis and things are working except for Google Drive/Backup, but I can remove it, re-install it and re-sync again. The upgrade did not offer me AFPS and I wanted to wait on that a bit. I am always nervous about new file systems and Apple has already had some security fixes for AFPS.
Can you believe I have another blog? 