sudo mkdir -p /System/Volumes/Data/mnt/shares
/ has been read-only since Catalina, but this didn’t affect things until a security update in May 2021 deleted the
/mnt symlink. It’s … difficult but not impossible to re-create that, but but it’s much easier to just point directly to the original location, and
automount doesn’t care. (I seem to remember there being some problem with using a static mount point in
/Volumes, as suggested in https://apple.stackexchange.com/a/261810, but I can’t recall the details.)
Add the following to
/System/Volumes/Data/mnt/shares auto_shares -nosuid,noowners
(This change is likely to be clobbered by system updates, especially from Catalina onwards.)
auto_shares (permissions 400):
username -fstype=smbfs,soft ://username:email@example.com:/obs/obsuser/username infosci-shared -fstype=smbfs,soft ://username:firstname.lastname@example.org/obs/obsdept/infosci/shared infosci-software -fstype=smbfs,soft ://username:email@example.com/obs/obsdept/infosci/software lecture-dropboxes -fstype=smbfs,soft ://username:firstname.lastname@example.org/its-alldropboxes # "V2" may differ, "u" is the first letter of the username. Check under Windows to get the actual path. staff-desktop -fstype=smbfs,soft ://username:email@example.com/mdr/Profiles-V2/u/username ...
(This file is not known to macOS, so it should generally survive system updates.)
Reload configuration with
sudo automount -vc.
See also https://apple.stackexchange.com/a/261813 for a more sophisticated version using a script.
Ensure that the mount point is not indexed by Time Machine. I suspect that this tickles the shares inside the folder, which seems to result in them being mounted over and over again until anything filesystem related grinds to a halt (the most I’ve seen is about 2300 mounts!). This appears to be a known problem under Catalina anyway; see https://discussions.apple.com/thread/250752057 for further discussion and a quick fix without having to reboot (TL;DR: disable the automount in
auto_master, reload configuration, then
umount repeatedly on anything remaining until it’s had enough ☺️).