group id (gid) under Mac's

I rsync'd a directory and noticed that the gid 5100 was not in my Mac's /etc/group file. So I added the group using the normal method (System Preferences -> Users and Groups) and could not find a place to update the gid. I also checked /etc/group file and was at a loss.

This link helped: https://superuser.com/questions/214004/how-to-add-user-to-a-group-from-mac-os-x-command-line

Doing a quick man on dseditgroup, with the information from that post, changing a gid on a group can be done via the following command:

sudo dseditgroup -o edit -i 5100 MyNewLocalGroup


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