I have made sure (several times) my contacts are synced to the same icloud server on my phone and computer several times. When I type a name in imessage on my computer it comes up as the name but switches to the number when selected. And when I try to save the number again from imessage it shows up in my contacts as already existing.
Hi,
The issue is being synced over iCloud regardless of the server involved.
On the Mac that should be as simple as going to System Preferences > iCloud and enabling the Contacts option.
The Same needs to be done on the iPhone using the same Apple ID.
The Messages app then needs to be using the same Apple ID.
This has to be an iCloud one but does Not have to be the same one used to sync the Contacts - it just has to be the same on the Mac and iPhone version of Messages.
If on the Mac in System Preferences > Internet accounts other services are also set to the sync Contacts List then you can have problems.
Disable them either in Contacts > Preferences > Accounts or in the System Preferences > Internet Accounts for each active account that is using Contacts to sync.
9:07 pm Sunday; May 15, 2016
Why doesn't my imessage show my contacts?
