Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi there Frank! Marc here.
I know it’s frustrating when something that should work just refuses to, let’s figure out what’s going wrong and get your Mac properly added to Microsoft 365.
Microsoft 365 apps for Mac (Word, Excel, etc.) are fully supported. You don’t need to “add” the Mac as a device manually, it usually links automatically when you sign in with your Microsoft 365 account inside any Office app.
Check your subscription type, go to https://account.microsoft.com/services and make sure your subscription is active and allows multiple devices (most personal, family, or business plans do).
Sign into an Office app open Word, Excel, or Outlook on your Mac. Click Sign In and enter your Microsoft 365 credentials. It should activate and register the device automatically.
Additional Info: Try signing in at portal.office.com to confirm your license is attached to your account. Check if you've hit the device limit (usually 5 PCs or Macs, 5 tablets, 5 phones). You can remove older devices at https://account.microsoft.com/devices.
Let me know how far you get and we’ll keep troubleshooting together if needed!
Best regards,