My iMessage app is not syncing with all devices
I recently added a new iPhone and Mac (replacing my previous models), and now some of my Messages don't sync with all the platforms as they did before.
iMac (M3, 2023)
Question marked as
I went searching in the community, and found this answer, which seems to be working for me as well:
"I don't know if this is the OP's issue but I did track down what was causing it for me. In my case I had purchased a new Macbook and messages wasn't syncing properly, especially when I was attempting to log into web pages that required a code sent my phone via SMS. I found the setting in my phone of all places, and not on my Macbook. In my iPhone I went to "Settings > Messages > Text Message Forwarding", and discovered that my shiny new Macbook was there but had not been enabled. I enabled it and restarted the phone for good measure, and that solved the issue for me."
It's certainly worth a try.