#0:188: execution error: Volume on disk0s1 failed to mount
3 messages · Page 1 of 1 (latest)
I'm having the same symptom after installing 13.3.1(a)
# diskutil verifyVolume /dev/disk0s1
Started file system verification on disk0s1 (EFI)
Verifying file system
Volume is already unmounted
Performing fsck_msdos -n /dev/rdisk0s1
Looks like the EFI partition is a DOS partition, and when I was searching earlier I spotted something saying you can't mount a DOS partition in single user mode, but surely this isn't affecting everyone