How to fix conflicting country code?
Network performance is quite unreliable on our Mac, despite having a WLAN router in the same room. I have attempted to identify the cause of this problem by using the built-in Wireless Diagnostics.
WIreless Diagnostics complains that our iMacs country code is set to DE, although its Region setting is Switzerland. My routers are of course, CH (for Switzerland, as Wireless Diagnostics confirms. A post on MacRumors said that I can correct the discrepancy by creating a new network location, but I see no possibility in network location to specify a country and a newly created network location did not change the situation.
I have read that Apple assigns the country based on how the nearby routers identify themselves, but this is obviously not the case here. This type of behaviour seems IAC inappropriate for a desktop computer which is always connected to the same LAN. How can I convince our Mac that it lives in Switzerland, not in Germany?
iMac 21.5″, macOS 10.12