I have recently upgraded (from 10.13) to Mojave (10.14). For some reason my ZFS disk are "seen" as FAT32 volumes... and obviously don't work !
MBP13:~ alex$ kextstat | grep lundman
73 1 0xffffff7f813a4000 0x498 0x498 net.lundman.kernel.dependencies.31 (12.5.0) B5522CE7-BF86-4025-8C10-C6D74BFD9C11
74 1 0xffffff7f813a5000 0x11f5000 0x11f5000 net.lundman.spl (1.8.1) 522C363B-617C-3BD6-9114-7CFCB2060A12 <73 8 6 5 3 1>
75 0 0xffffff7f825f6000 0x30b000 0x30b000 net.lundman.zfs (1.8.1) 0E2ADDD4-FAEF-388B-8F84-1D8CDD0E3194 <74 26 8 6 5 3 1>
MBP13:~ alex$ sudo zpool list
Password:
no pools available
MBP13:~ alex$ diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 500.1 GB disk0s2
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +500.1 GB disk1
Physical Store disk0s2
1: APFS Volume Macintsoh HD 414.5 GB disk1s1
2: APFS Volume Preboot 43.2 MB disk1s2
3: APFS Volume Recovery 517.0 MB disk1s3
4: APFS Volume VM 8.6 GB disk1s4
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *32.1 GB disk2
1: Windows_FAT_32 32.1 GB disk2s1
Disk 2 is actually a ZFS volume, created under 1.8.1.
Interestingly it will show up for time to time after a cold reboot (but not always). Never manager to have it work plugging it "live" into the system,
Any help / pointer much appreciated.