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About a month back one of our Macs crashed and we had to restore it. The computer had an external drive connected to it and all the data is still there. Though some of the users are "missing". If we look at the permissions the user field says "Loading..." (or something similar, not an English machine) for some of the users.

If we goto the terminal and use ls -l on the drive the 3rd column gives us a GID/UID and the 4th says nogroup. (thanks Jason Salaz, for your answer).

Can we somehow recreate this group or user?

share|improve this question
Wouldn't it be easier to just reassign a different owner/group to these files? – patrix Apr 5 '13 at 11:19
The group has different permissions for different folders and there are alot of folders & files so it would take some time to do it by hand. – Oskar Apr 5 '13 at 11:24
Changing the group ownership (with chgrp -R) does not change permissions per se. – patrix Apr 5 '13 at 11:37

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