Mac OSX Terminal – Create New Admin User

#!/bin/sh

#  CreateAdminUser.sh
#
#  Created by David Kittell on 12/8/17.
#

clear

userFullName=$1
userName=$2
userPassword=$3

echo "Checking If User Exists"

# List Local Users
# dscl . list /Users | grep -v '_'

if [[ $(dscl . list /Users) =~ "$userName" ]]; then
  echo "User Exists"
else
  echo "User Does Not Exist"

  maxid=$(dscl . -list /Users UniqueID | awk '{print $2}' | sort -ug | tail -1)
  #echo $maxid
  newid=$((maxid+1))
  #echo $newid

  sudo dscl . -create /Users/$userName
  sudo dscl . -create /Users/$userName UserShell /bin/bash
  sudo dscl . -create /Users/$userName RealName "$userFullName"
  sudo dscl . -create /Users/$userName PrimaryGroupID 1000
  sudo dscl . -create /Users/$userName UniqueID $newid
  sudo dscl . -append /Groups/admin GroupMembership $userName
  sudo dscl . -create /Users/$userName NFSHomeDirectory /Local/Users/$userName
  sudo dscl . -passwd /Users/$userName "$userPassword"
fi

sudo sh CreateAdminUser.sh "Test User" "lUser" "SomethingSecret"