Catalina now can't send attactments (small) with Messages
Using Catalina/Mac Mini - without having made any changes, Messages now won't "deliver" a text wtih an attachment (even a small file) -- this is happening when I try to send to another iMessage user or SMS. Both my iPhone (6s+) and new iPad work perfectly.
Would re-setting Messages help, and if so, how do I do that? Thank you.
Mac mini, macOS 10.15