My work MacBook has an absolute nightmare with my home WiFi – I get about a minute's internet and then it's out for a few minutes. Rinse and repeat. This is constant, I've had the machine since April and whenever I bring it home this happens. I ran Wireless Diagnostics and it says there are conflicting country codes between my machine and routers. The problem is, it's my Mac which has the wrong country code (DE), and the routers have the correct (GB) one. Will this affect my WiFi performance? All other devices connect without problems. Can I change my country code on my Mac? Any help appreciated. It's driving me mad. I can't get anything done on it.