OS X commands

Enable screen sharing/VNC

 $ sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -activate -configure -access -on -clientopts -setvnclegacy -vnclegacy yes -clientopts -setvncpw -vncpw <password> -restart -agent -privs -all

List all groups 

  $ dscl . list /groups
  
List group members

 $ dscacheutil -q group -a name <group name>
 
Create a new group and add group number
  
   $ sudo dscl . -append /groups/<group name> gid <gid #>
   
Add user to group

 $ sudo dseditgroup -o edit -a <username> -t user <group name>
 
List regular users

  $ dscacheutil -q user | grep -A 3 -B 2 -e uid:\ 5'[0-9][0-9]'