Re: Apple Says Family Limit Reached When I Only Have 4 People, Including Me
Wondering if this is where you tried:
go to Settings > Family and tap + in the top‑right corner.
Then tap Invite Others and follow the onscreen instructions.
Else: Wondering which MacOS version is installed on your MacBook Pro. Keeping a Mac updated to the newest compatible MacOS version often sidesteps issues. You can check in System Settings > General > Software updates.
(NB: It is always wise to back up your Mac before updating or upgrading MacOS)
_______________________________
If your Mac is already up-to-date: Try restarting your Mac (Eg: Apple menu > Restart " ... deletes temporary files, re-establishes connections, may update any recent setting or account changes, and often restores order if something is not working as expected.
___________________________
If nothing above has helped:
How to set up Family Sharing on your iPhone, iPad, or Mac - Apple Support
Eg Apple Support says at the bottom of above article:
"Need more help?
Tell us more about what’s happening and we’ll suggest what you can do next.
Get suggestions