OpenZFS on OS X

I am move a ZFS array to a new Mac running Catalina. The first time I turned
it on and did an import, it said I need to use -f due to a change in system
id (or some similar message). Since this is true, I did the import with
-f and all went well. My file systems all mount, life was good.

Now after a reboot, import fails to find the pool. The disk are all there
as expected (via diskutil list), however zpool import says "no pools available to import"

zfs.kext_version: 1.9.4-0
macOS 10.15.5

Any advice greatly appreciated..

I try to use zdb to list one of the disk:

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/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *10.0 TB    disk2
   1:                        ZFS kettle                  10.0 TB    disk2s1
   2: 6A945A3B-1DD2-11B2-99A6-080020736631               8.4 MB     disk2s9


and get

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% sudo zdb -l /dev/disk2
cannot open '/dev/disk2': Operation not permitted
% sudo zdb -l /dev/disk2s1
cannot open '/dev/disk2s1': Operation not permitted

This seems to be a hint that some of the new security is getting in the way..

Disabling SIP brought ZFS back

!!!!!

You shouldn't need to disable SIP in order to use OpenZFS on Catalina. (I run with both.) You might need to give full disk access to /bin/bash, though.

Yes, it's strange, SIP and OpenZFS run together fine on my Mac.