messages from iPhone not getting into messages on Mac

I'm not sure why anyone would hate to give a recommendation to restart a device. It can't hurt, it may help, it's easy, non-destructive of data and it doesn't take long. I think it's a good place to start.

For Message issues, I've also found that logging out of iMessage on all of the devices, then restarting them, then signing back in on the iPhone, waiting until it activates then signing in on the other devices can resolve things.

If you're also trying to sync SMS messages between the two devices, remember there is an additional step. On the iPhone, you need to go to Settings>Messages>Text Message Forwarding and select your Mac.

Forward SMS/MMS text messages from your iPhone to your Mac or iPad - Apple Support

This might be one of the cases where a restart on both devices could solve the problem. I hate giving this recommendation, but have seen many times where it has helped in this situation.

The other option that has worked for some people is switching iCloud off, then back on.

Since it had been working and suddenly stopped, it does not seem like a setting problem. I think it is just a glitch where it looses the syncing ability and needs a little jumpstart.

Wet Baloney wrote:

thanks all. I got the problem solved with the help of Apple Support and screen sharing. It was ultimately a cascade of issues traced back to family sharing

Wow! Glad to hear you got it sorted out.