Automount settings from fstab not respected after Sequoia update

I found the same issue (and a solution) with fstab settings not working specifically for the 'msdos' filesystem type. My goal was to prevent auto-mounting a drive embedded within my MSI Optix monitor. This annoying bugger was mounting when connected to the monitor, and re-mounted after every ejection.

Prior to my Sequoia upgrade, my working solution was the following fstab entry created using vifs:

UUID={uuid from diskutil} none msdos rw,noauto

My solution was to change the filetype to from 'msdos' to 'auto'. This auto-detects the drive type.

UUID={uuid from diskutil} none auto rw,noauto

This prevented auto-mounting after drive ejects, and after reboot.

Edit: Not so fast

I double-checked and it looks it is does work, but only if the external is not msdos. I tried apfs, hfs+, and exfat and I could configure all of them to not automount. But msdos would always mount.

You have to remember Mac OS is built upon a Darwin kernel that always been there. So Linux things will NOT work, only Unix programs! I’t will give you the networking command on Mac OS is man networksetup and run that to put in networking on Mac! Linux networking commands don’t work!

I just tried it and I get the same behaviour. It's either broken or simply no longer supported.

I wonder if the related man page has changed to explain it (which I would expect if not supported any longer).

Interesting. I wonder if NTFS would respect the setting or not.

Try 'auto' instead of 'msdos'. This worked for me and my MSI Optix monitor with a built in drive for drivers.

Example:

UUID={uuid from diskutil} none auto rw,noauto