Log on to the IMac in the lab

Go the the "Apple" Icon and then select >System Preferences

Go to the Bluetooth System Preference and open it by

double clicking it

Then turn on the Bluetooth on the headphone device you

want to connect

The Bluetooth on the computer needs to be ON - but it defaults to ON

The headphones should show up in the list so you can pair with the computer

Click on "Pair"

The device should pair and show as "Connected"

Then the headphones will work with the computer.