if you really don’t understand, and your teacher gives you permission. i don’t know if this’ll work, but there’s a program sold in apple that you can install. it makes your computer both mac and windows. for gamers ofcourse. it MIGHT work, but your comp will be a larger target for viruses and bugs.

if not, just use the recording system in the iMovie (i think) application, to record whatever your teacher says. so you can re-do things at home.

go to your professor during his/her office hours and explain the problem and find out first-hand how to fix it.

go to a computer lab on campus and ask someone to walk you through the problem

find an online tutorial

ask someone else in the class for help

ask a friend for help.