MacOS – Messages.app notification only shows contact number instead of contact names on macOS

Just to give post-iOS 7 input, the contact situation is still problematic. If a Facebook friend changes their last name to something else (or uses a joke name), it will cause sync problems with your contacts.

You can “Link” contact cards together (edit one contact, go to the bottom, hit Link Contacts, and connect it to another card). This usually keeps the contact info connected even if the name on Facebook changes, but in my own, personal experience, contact sync errors happen when it tries to update from Facebook when you have a poor cell/wifi connection. But that may be unrelated.

A side note: I found a bug in iOS 7 though; when you link personal cards (i.e. your information from Facebook to your personal card that Siri uses), deleting duplicate or outdated fields will cause the Contacts or Phone app to crash. So if you link your own contact cards together and have to make an edit, you have to unlink them first.

I have been having this same problem and as I go through this thread I found that I could answer yes to everything, but the problem persisted.

I ended up opening the Contacts page on my Mac and while the contacts I needed were in "All Contacts" they were not in the "On My Mac" so I highlighted them all under "All Contacts" and did a drag and drop into "On My Mac" it fixed almost all my problems.

The ones that it didn't fix I found out that the formatting on the phone number themselves were not correct. For example the one on Mac messenger was 1(234)567-8900 while the contact card did not have a 1... so, (234)567-8900. Changing those two things fixed everything.