1- GO to this page:
https://adweb.cis.mcmaster.ca /cis/ahtml/login.htm
2-Look to the left, there's a list of "Student Applications"
3- The first one says "Grade Report", click it.
4- A page will pop-up, go down press continue, and it'll take you to log-in with your MacID
5- Your grades show up!
OR:
You log into MUGSI as you're doing right now.. Click the academics tab on the left. It takes you to the page, then look to the right for "Degree Audit". Click it, and then a page will popup. Press submit and your grades will also show up.