When working in the mac lab you will need a mac compatible external hard drive.
Please see Hard Drive and Flash Drive Formatting for information on how to ensure your hard drive is mac compatible.
You will then need to know how to get your working files onto an external hard drive within the editing software of your choosing.
There are 3 video software options in the mac lab, iMovie, Final Cut Pro and DaVinci Resolve (Free Version).
Below are three instructional videos outlining this process for each software option.
DaVinci Resolve
Final Cut Pro X
iMovie