This is very important to go through each check box when you create image for Mac OS
Install new OS on one IMac machine
Check and install all the update
sudo sh -c 'echo "Sandboxing Off" >> /etc/cups/cups-files.conf'
sudo launchctl stop org.cups.cupsd
Go to System Preference -> Network -> delete Firewire, Buetooth, Thunder... Go to the gear -> Set service order -> moving ethernet to the top