iCloud Drive greyed out/disabled on Mac

Hey M.E.D,

We'd be happy to help out. We understand you're having an issue enabling iCloud Drive for your Mac.

The following details might be helpful to get started:

If you already use a feature from another cloud provider that syncs or manages your Desktop and Documents folders, you need to turn it off to use Desktop and Documents. Desktop and Documents requires macOS Sierra or later. 

This is outlined further here: Set up iCloud Drive - Apple Support

We also notice you're low on storage and also have Optimize Mac Storage disabled. Perhaps you don't have enough local space to fit everything currently in iCloud Drive so enabling this feature could help reduce the amount of free space you need.

We hope this helps out.

Take care!

Hey M.E.D,

Have you tried performing those actions to see if you have the same response in safe mode? After testing, go ahead and restart normally and test again because sometimes just starting in this mode and then restarting normally can resolve issues: How to use safe mode on your Mac.

Keep us updated.

Rather doing an archive installation , erase the hard drive complety and reinstall Mac OS Erase and reinstall macOS - Apple Support

Hello M.E.D,

If the issue persists, further assistance may be needed. We want to make sure you reach the right team for help with your Mac, so we recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: Get Support - Apple.

Thank you for participating in the Apple Support Communities and have a wonderful day.