systems library photos

Hello martian99,

Thank you for reaching out in Apple Support Communities. We understand that you're unable to designate your System Photo Library, as it is grayed out. We'll be happy to help.

Based on this article here: Designate a System Photo Library in Photos. It says: "If Use as System Photo Library is grayed out, the current library is already set as your System Photo Library." Therefore, there's a chance that your current library is already set as your System Photo Library.

Please let us know if that is the case.

Best regards.

martian99,

That's wonderful to hear! Thanks for getting back to us and for providing the update.

Have a wonderful rest of your day.

Cheers!