How to update apps outside the US?
I don't have any particular experience with overseas connectivity but I wonder if getting a VPN service specifically from Hong Kong with an exit there would fix the issue. This might allow the HK Apple store to see your MacBook as local to HK rather than where you actually are and connect you to the HK Apple store. I know people do this all the time to connect to TV streams overseas from their home country, might this work the same?