Messages from one person do not appear in Mac's Messages app
Hello
My mother has a Mac Mini from 2011 and runs High Sierra 10.13.6. Messages from my iPhone do not show up in the Messages app on her computer. They do however show up on her iPhone.
I have checked the system requirements for Continuity and while some things, like Handoff, won't work on her Mac Mini, Text Message Forwarding seems to be compatible (and is activated on her iPhone).
I'm not really sure which end to begin the troubleshooting on this so would appreciate suggestions.
Thank you in advance
Philip