Hi I am having the same issue on my MAC.  I can't change from the Chinese Mainland.  Really annoying!  All I want to do is update the maps!  Why is there no MAC version of Garmin Connect?  This is so stupid!

Worked for me but this is a weird bug and it needs to be fixed.

It won’t connect to the domain. 

I too can only connect to the Chinese servers. I am unable to change domains nor successfully log into Garmin Express. This is really frustrating. Garmin already has the worst music streaming capabilties and I now we can't upload our own Mp3's.

I tried that yesterday and same thing. I have run multiple error reports and it seems there is a bug in the Express build.I have since given up and found an easier way to add music files by using Android file transfer for mac.

7134227 1202240 I have went ahead and sent you both an email to gather additional information in regards to this 

Thanks! This answer worked for me on a Macbook Pro with macOS 26.5.2.