Use VPN if off campus.

For Macs download the Microsoft Remote Desktop app here. Install it.

Open the app and add a new Desktop connection:

Connection name: WTS
PC name wts.umn.edu
Credentials  
User name AD\yourX.500
Password yourX.500Password

Close the edit window. Now you can double-click on your new desktop connection. It should open a Windows window on your machine. If you click on Start, you can locate and select Wolfram Mathematica/Wolfram Mathematica 11 to start Mathematica session. You will also need to open a Browswer such as Google Chrome to fine the class web page and download the lecture notebooks and exercise notebooks.