I probably went about this wrong. Again.
Anyway, this post is about migrating ONE THING: the Stickies data, without doing a pile of new-sticky/copy/paste. Yeesh. This was painful last time...
Am migrating from Monterey to Tahoe. Reason: Monterey machine has been crashing a bunch. HARD crash that reboots. i.e., time for a new machine.
Found a great one on EBay, 60 miles away, so I drove to pick it up.
This project doesn't have a standard export/import behavior, which is stupid.
So where are the Stickies notes on Monterey?
~/Library/Containers/Stickies/Data/Library/Stickies/*
You need to archive that folder. OSX really does not want to let you see that folder.
Get to Finder, then command-shift-G, enter Library, which gets you started. You can find Containers in the list, then Stickies, etc.
Click right on "Stickies" and then "Compress Stickies" in the popup. Now drag the resulting Stickies.zip files over to a location like "DropBox" where you can do a casual share.
Copy that zip to the new machine (Tahoe, in my case).
cd ~/Library/Containers/com.apple.Stickies/Data/Library
(I don't know why that background turned black there)
copy Stickies.zip into the current folder, then
unzip Stickies.zip
Now you can open the Stickies app and poof! All your stickies notes are back, just like you had them before.