I had the error when attempting it earlier. Garmin Express downloaded the map but gave an error on install from a W10 machine. I had a chat with support who said they will check it out and get back to me.
Failed here too. Last time a map update was available it consistently failed to install for a few months and then installed with the release of software version 8. Looks like it's broken again. Feels like par for the course, business as usual.
Context: Error message: "There was an error installing the update" Garmin Express Mac version: 184.108.40.206 (which has just been released, but it failed with the previous version before I updated to latest GE, too.) Fenix 5x with 220.127.116.11 beta
Looked at the workaround. Doesn't obviously or intuitively, er, map onto the files and folders I see in my Mac's Garmin folder in Application Support folder. There's definitely some activity there today as it has tried to assemble the maps but no file that looks like a candidate to copy across to the watch. I'll pop over to Alan's post and see if he can provide any insight on doing this on a Mac.