I have a macOS Mojave (10.14.2)
and I would like create a 20 GB MS-DOS (FAT)
partition on my 128 GB APFS
disk.
But Disk Utility
constantly gives me an error:
My Time Machine is turned off:
My FileVault is turned off:
I also tried the followings:
tmutil thinlocalsnapshots / 9999999999999999
command to delete snapshots.First Aid
in Disk Utility, then restarted withCommand + S
and typed/sbin/fsck -fy
in terminal. In both cases it said that my disk appears to be OK.- Tried to boot in Safe mode (
Command + Shift
) then start partitioning. - Tried to restart with
Command + R
then partition fromDisk Utility
.
The problem is the same with Boot Camp Assistant
, if I try to install Windows 10.
Why on Earth Apple prevents their users to use another operating system next to macOS? Is this a nefarious business tactics? Because it seems not to have solution at all while having an APFS disk!
Best Answer
Okay I solved the problem. First I created a backup, because everything got erased!
Disk Utility
APFS
Mac OS Extended (Journaled)
withGUID Partition Map
After installing macOS you can set your previous Time Machine backups. Finally I'm done, and now it enables me to partition my disk.
The problem was the
APFS
didn't enabled me to partition, onlyHFS+
.But be careful: since
APFS
is now the standard filesystem on Apple devices and if it has some important advantages which is not supported byHFS+
you will be messed up.Take a look at
APFS
advantages before you choose.Although you can reset your disk back to
APFS
anytime you want, but you might miss the ability of partitioning.I think if you want to keep your drive as
APFS
you can purchase an external hard drive (it doesn't cost so much, but indeed needs extra care if you are working with a laptop).Edit: After I erased my SSD with
HFS+
, I tried to erased it withAPFS
once again. (the whole SSD) And this time, it enabled me to partition inAPFS
. :)