With 10.11 El Capitan some directories in /System has been locked down. This is all fine and we can handle that, with the exception of our filesystem-bundle. Ie, what we would place in /System/Library/Filesystems/zfs.fs/ can no longer be put there. (rootless).
I have noticed that diskartbitrationd does build a path using "/Filesystems" but the obvious places (/L/Filesystems and ~/L/Filesystems) do not work.
So what is the new location for our filesystem bundles ? Asking users to disable rootless to install a filesystem does seem somewhat extreme.
Please advice,
Lund