Transferring Messages from old Mac to new Mac I have a new Mac and I didn't use the Migration Assistant to move my data. I want to now transfer my old messages from my old Mac to my new Mac. It appears all the old messages are in buried in the old Mac's Library folder.

Is it possible to migrate and merge my old messages from my old Mac to my new Mac?

If so, how?

Note, I do (did) use iCloud iMessage on the old and new mac, but it doesn't appear all my old messages were downloaded from iCloud to my new Mac when I setup my new Mac and iCloud. I'm not sure that's even how it works.
I was able to retrieve my ~/Library/Messages folder from a backup and copy it to a new Parallels macOS VM under the my Home folder on that VM. When I logged into the VM, I saw all my old messages.