I was willing 2 try zfs on MacOS but when I saw u need to set verbose flags "to make your kernel panics more useful"... So it's not a matter if this software has some issues, IT'S TOTALLY SURE IT WILL BE KERNEL PANICS ON A FILESYSTEM LOW LEVEL SERVICE!!!
Uninstall before upgrade?
The instructions are not clear on if you need to uninstall before upgrading O3X. (They are clear that you must uninstall if upgrading from a different distro.) Anyway, I upgraded from 1.4.5 to 1.7.2 without uninstalling, and it seems to have worked fine.