No no issue and any of my Mac`s, all update fine
Q-6
The "weather" updates fine.
We mean the "location" doesn't change when the Mac is moved, namely the current location doesn't pop to the top of the list and have location icon attached.
Duh, sorry, same both retinas updated fine from Borneo to China no problems. Might be worth checking that "Weather" is ticked under Privacy, in System Preferences as that will block it. Equally I don't use a list of cities I just leave the system to update the current location.
Q-6
Interesting, when you said Macs, I assumed you misread the question, didn't figure you'd travel with more than one. Sorry about that.
The fix the OP is describing is uncheck/check in System Preference/Privacy as you described, same with me. BTW, even a restart doesn't force an update.
Anyway, it's interesting that it works for you with no list. My travel cities are also in the list so they get duplicated when they are the current location, same thing on the iPhone. I would reduce to current location only but weather in 10.10 syncs with the iPhone and I don't want to loose my predefined locations everywhere.
Just to update, am now in Romania and same as previous weather updates perfectly as long as your on WiFi.
Q-6
Thanks for the input.
I think the problem is if the location is predefined it can't be loaded dynamically. I tested with no predefined locations and it works. On the iPhone it duplicates the location, the Mac doesn't do that, it just fails.