My airplay suddenly stacked on extended desktop. I can not change to "mirror iMac" choice. In extended desktop mode, sound is ok but blank display on apple tv (3rd gen). Any comment please ?
OS X Mavericks (10.9.2)
Finally, after spending hours on the blogs I have found that extension of iScreen third party application which I have downloaded and deleted 2 years ago was the problem. I have deleted the extension and problem solved.
After 10.9.2 update, do not use any of third party remote desktop or similiar softwares.
Airplay stacked on extended desktop
