Hi there Jim Lewis,
We understand you're experiencing an issue with setting up iPhone Cellular Calls on your Mac, and we'd like to share a resource that can help.
Check it out here: Make and receive calls on your Mac, iPad, or iPod touch
Specifically, take a look at the section below:
"Set up iPhone Cellular Calls
You can use iPhone Cellular Calls with any Mac, iPhone, iPad, or iPod touch that meets the Continuity system requirements. It works when your devices are near each other and set up as follows:
- Each device is signed in to iCloud with the same Apple ID.
- Each device is signed in to FaceTime with the same Apple ID.
- Each device has Wi-Fi turned on.
- Each device is connected to the same network using Wi-Fi or Ethernet.
- On your iPhone, go to Settings > Phone > Calls on Other Devices, then turn on Allow Calls on Other Devices.
- On your iPad or iPod touch, go to Settings > FaceTime, then turn on Calls from iPhone.
- On your Mac, open the FaceTime app, then choose FaceTime > Preferences. Click Settings, then select Calls From iPhone.
If your carrier supports Wi-Fi calling on other devices, you can set up those devices to make and receive calls even when your iPhone isn't turned on or nearby. Learn about Wi-Fi calling."
We hope this helps.
