CUPS is a network printing service used by Mac computers. It allows you to setup your printers on a network, and customise options such as tray setup.
- Go to http://localhost:631/printers/.
- A screen will appear saying 'Web Interface is Disabled'
- Start enabling it by opening 'Terminal' program.
- Select and copy this command 'cupsctl WebInterface=yes' in Terminal and hit enter.
- After that, visit again this url http://localhost:631/printers/ and enter your MAC computer username and password.
- You will see something like this after logging in.