After a recent OS X update (currently Sierra, 10.12.3) the normal user on this machine is no longer in the
I don't know what caused the account to be removed from that group; how can I get it back?
Advice found via I don't have administrator account on my mac suggests booting to Single-User mode, and using the
dscl . -append /Groups/admin GroupMembership username
This fails immediately:
Could not read path: path = /System/Library/LaunchDaemons/com.apple.DirectoryServicesLocal.plist, error = 2: No such file or directory
and no change in groups occurs. Apparently I can't expect
dscl to work in Single-User mode.
So what should I do, to re-add the username to the