OSX Commandline User/Group

“Add a New Group” similar to groupadd on Ubuntu.

Basically does this sort of thing,

dscl . create /groups/GROUPNAME gid GROUPGID
dscl . create /groups/GROUPNAME passwd '*'
dscl . merge /groups/GROUPNAME users USERNAME

You could also download the GNU OSXUserTools (V1.4) which includes:

• useradd
• groupadd
• groupdel
• userdel
• etcpasssync

“Add a user to the admin group via command line“
Make sure the user’s not already in the group,

niutil -readprop . /groups/admin users

Add a user to the group,

niutil -appendprop . /groups/admin users gneagle

Removing a user from the group:

niutil -destroyval . /groups/admin users gneagle

The modern way to do this is,

sudo dscl -p / -append /Groups/GROUPNAME users USERNAME

For more info, see the poorly-named ”How to: Add a user from the OS X command line, works with Leopard!” (which isn’t Leopard specific.)

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