Microsoft does not make a desktop version of PowerBI for mac, but there is an online version you can try. This link is for the PowerBI website: https://powerbi.microsoft.com/en-us/
On the PowerBI website you should see the words "Sign In" towards the top right hand side of the screen.
Click that link and sign in using your BU email address, which should send you to a page with the BU camps (BUSU and Clark Hall picture on the left hand side of the screen) and then enter your BU password.
This should get you on the the web version of PowerBI.