The light is green, under network, and the connection works even though I have an exclamation mark on the wifi sign. Airplay doesn't work, on my Apple TV. Already tried to switch everything off/on but nothing changed. How can I fix it?
MacBook Pro with Retina display, OS X Mountain Lion, I love it!
After trying all kinds of suggested solutions, I tried yours and it fixed the problem immediately. It was really annoying to have full internet access but see that stupid exclamation mark on the wifi icon.
I don't see too many "stickies" but somehow I think every 10.8.3 user should somehow be able to find this information easily - and quickly. I'll post it on my blog, but it would be nice if these forums had a way to make this a "must read" option for the masses.