When I wake my machine in the morning, it often stays blank because there's some conflict between my 4k monitor and the 'Your computer name has changed for the 3950th time' dialogue that means both screens are off until I dismiss the dialogue I can't see.
I don't want to have to turn wifi on and off manually – we have computers to do things automatically for us – and I need a wired connection while I'm at my desk.
So can I tell the Mac only to enable to wifi if eth0 is inactive?
Or turn the 'Your computer name has changed' dialogue into a notification that doesn't need manual dismissal, because I really don't care what number Apple has decided to add to it today?
Best Answer
You have several solutions:
https://macperformanceguide.com/blog/2014/20141118_0958-OSX_Yosemite-disable-WIFI.html
The associated google search :
https://www.google.fr/search?client=safari&rls=en&q=disable+wifi+if+ethernet+osx&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=VL_cWMj1B-zUXt3CkLAM