Since I upgraded to Catalina, certain messages that I get on my iPhone don’t show up on my iMac. Specifically text messages from financial institutions, local governments, shipping companies, Amazon etc. come through fine on my phone, but don’t show up in Messages on my iMac. All text messages from my family et al. appear on both my phone AND on my iMac running Catalina. I have I have tried all the standard fixes on the Internet: checking and rechecking the iCloud accounts and the Apple IDs, restarting, turn things on and off. All my contact info with those whose text messages show up on my phone but not on my iMac are correct (obviously as they successfully appear my phone).
(Messages problem solved. Thanks to Mark Williamson—see below.)
My daughter tried to share a note. My wife, who has not upgraded to Catalina, was able to open the note. I have upgraded to Catalina, and the note won’t open for me. I continually get an alert that says “Sorry, this note cannot be opened right now. Please try again later.” I have tried all the standard fixes on the Internet: checking and rechecking the iCloud account and the Apple ID, restarting, turn things on and off. But nothing works.