Currently, Mac computers in our computer labs require an additional 3 steps to complete the printing process. This is due to some print jobs becoming "stuck" in the print queue that will have to be manually pushed through.
It's a very easy three-step process
1. Click on the printer icon on the bottom right of the screen.
2. Click Resume.
3. Enter your 4+4 and password.
Attached is a PDF that includes images of the process.