How can I retrieve FaceTime contacts on my iMac computer? Or are they lost forever?

[jrmor]

After I installed macOS Sierra, my FaceTime contacts disappeared. Is there a way to get them back. I tried the search box, but not helpful. Thanks

 

[Tartarus]

Log in to iCloud.com through Safari and see if your contacts are still there.
If so, disable contacts in settings > iCloud on your iMac and enable it again.
They should appear.

 

[JBaby_9783]

Have you logged into iCloud? Your history may not return, but your contacts will.