FaceTime difference
macOS 10.11 I have not used FaceTime for several years. Now I wish to use it again. When I look in Contacts, some of the entries have the video camera and the phone handset lit up, and I am able to click on them and make contact with the person. Other cards in Contacts do not have the camera and handset illuminated and will do nothing when clicked. Why are some connectable and some not?
iMac, OS X 10.11