Has anyone else had problems with Time Machine. The first backup I tried said looking for Backup Disk for about 15 minutes, I then canceled it, and removed and reset the time machine disk in system preferences. Now it's been stuck on preparing Backup for the last 1 hour. I have read nothing about Time Machine not working with APFS, I know we have to keep our Time Machines in HFS+ UPDATE: After 1hr 5 minutes, it's finally backing up. Over 20GB backup also. So so far it's the slowest part of the new macOS.