Hi @CALMA Mikaela,
What the error message did you get when you login the Account in Mac.
How did you get the account?
I suggest you sign the https://www.office.com/ and check if you can sign in the portal without problem in Mac.
Please you provide the error message when you try to sign in Mac so that I can get more accurate solutions to this problem. I’m glad to help and follow up your reply.
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