OpenZFS on OS X

i recently updated Open ZFS on OS X to version 2.0.1 on a system running macOS 11.2.3. i exported my zpool prior to the upgrade, but now after the upgrade i can't get the zpool to mount. the zpool does not show up as an option when using the "import" command but is listed as online after using the "list" command and the "status" command reports that there are no known data errors. what did i do wrong and, more importantly, how do i fix it?

Sounds like it is working then? It's imported and status is OK.
Is it mounted? "zfs mount" and "mount" commands

thank you for responding!

no, the pool isn't mounted. running the "zfs mount" command (i.e., sudo zfs mount [pool name]) results in an "internal error: out of memory" warning.

Can you also make sure you are running the correct "zpool". As in "which zpool", and "zpool version"

Just had the same problem after upgrading my machine (still on Catalina) from 1.9.4 to 2.0.1. The log files and noticed that in org.openzfsonosx.zed.err it was complaining:

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ZFS Event Daemon 2.0.1-1 (PID 3626)
Failed to initialize libzfs
Ignoring "zed.rc": not executable by user
Registered zedlet "zvol.remove.sh"
Registered zedlet "vdev_clear-led.sh"
Registered zedlet "history_event-zfs-list-cacher.sh"
Registered zedlet "data-notify.sh"
Registered zedlet "all-syslog.sh"
Registered zedlet "zvol.create.sh"
Registered zedlet "pool_import-led.sh"
Registered zedlet "scrub_finish-notify.sh"
Registered zedlet "resilver_finish-notify.sh"
Registered zedlet "vdev_attach-led.sh"
Registered zedlet "snapshot_unmount.sh"
Registered zedlet "statechange-notify.sh"
Registered zedlet "resilver_finish-start-scrub.sh"
Registered zedlet "statechange-led.sh"
Registered zedlet "snapshot_mount.sh"
Ignoring "zed-functions.sh": not executable by user

And indeed, both scripts in /etc/zfs/zed.d don't have the execute bit set:

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total 20
lrwxr-xr-x  1 root  wheel     46 May 29 14:32 all-syslog.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/all-syslog.sh
lrwxr-xr-x  1 root  wheel     47 May 29 14:32 data-notify.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/data-notify.sh
lrwxr-xr-x  1 root  wheel     65 May 29 14:32 history_event-zfs-list-cacher.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/history_event-zfs-list-cacher.sh
lrwxr-xr-x  1 root  wheel     51 May 29 14:32 pool_import-led.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/pool_import-led.sh
lrwxr-xr-x  1 root  wheel     58 May 29 14:32 resilver_finish-notify.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/resilver_finish-notify.sh
lrwxr-xr-x  1 root  wheel     63 May 29 14:32 resilver_finish-start-scrub.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/resilver_finish-start-scrub.sh
lrwxr-xr-x  1 root  wheel     55 May 29 14:32 scrub_finish-notify.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/scrub_finish-notify.sh
lrwxr-xr-x  1 root  wheel     50 May 29 14:32 snapshot_mount.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/snapshot_mount.sh
lrwxr-xr-x  1 root  wheel     52 May 29 14:32 snapshot_unmount.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/snapshot_unmount.sh
lrwxr-xr-x  1 root  wheel     51 May 29 14:32 statechange-led.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/statechange-led.sh
lrwxr-xr-x  1 root  wheel     54 May 29 14:32 statechange-notify.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/statechange-notify.sh
lrwxr-xr-x  1 root  wheel     51 May 29 14:32 vdev_attach-led.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/vdev_attach-led.sh
lrwxr-xr-x  1 root  wheel     50 May 29 14:32 vdev_clear-led.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/vdev_clear-led.sh
-rw-r--r--  1 root  wheel  14320 May 26 11:41 zed-functions.sh
-rw-------  1 root  wheel   3590 May 26 11:41 zed.rc
lrwxr-xr-x  1 root  wheel     47 May 29 14:32 zvol.create.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/zvol.create.sh
lrwxr-xr-x  1 root  wheel     47 May 29 14:32 zvol.remove.sh@ -> /usr/local/zfs/libexec/zfs/zed.d/zvol.remove.sh

Adding the execute bit to both fixes that:

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chmod 0755 zed-functions.sh
chmod 0700 zed.rc

Seems the .pkg's need to be rerolled.

i'm not sure what you mean by "which zpool" exactly... are you asking whether or not i am including "sudo" as part of the command? if so, yes. if not, can you explain how i would find that info, please?

as for "zpool version," running "zpool --version" reports "zfs-macOS-2.0.1-1" and "zfs-kmod-macOS-2.0.0-2g0197ddc9c5-dirty."

also, running "zpool upgrade -v" reports that zpool version is 28...

"zfs-macOS-2.0.1-1" and "zfs-kmod-macOS-2.0.0-2g0197ddc9c5-dirty."

You have a version mismatch.

"which zpool" is literal. Ie,
# which ls
/usr/bin/ls

sorry for the delay in responding... i spent the weekend moving!

the "which zpool" command reports "/usr/local/zfs/bin/zpool"

how does one go about addressing mismatches?

thanks again for your time and patience!

It's the kernel side that is older, so you may want to make sure zfs.kext is gone, even after a reboot