Apple - macOS Mojave won't install updates past 10.14.1 due to requirement for APFS formatting
I had the same problem. After multiple searches, the only way I found to get the drive updated to APFS was the following:
- Full clone of internal drive to external drive using SuperDuper! (Carbon Copy Cloner would also work from what I've read)
- Reboot from external drive
- Reformat internal drive as APFS
- Full clone of external drive to internal drive using SuperDuper!
- Reboot from internal drive
It feels like there should be an easier way to do this, but I couldn't find it.