After OS X Mavericks v10.9.2 Update I cannot use my Apple TV anymore.
After OS X Mavericks v10.9.2 Update I cannot use my Apple TV anymore. There is a black screen. I cannot switch to the mirror option. I can use the apple tv from my iPad - so APTV is working. I have restart the computer and the apple TV.
iMac (21.5-inch, Late 2012), OS X Mountain Lion (10.8.4)