Yes, new 27 iMac maxed out pretty much has stopped outputting sound either through internal speakers or with a headphone plugged in. This happened out of nowhere, noticed no chime turning the machine on.. doubled check everything.. tried resetting the SMC I think is called and the VRAM clean up and nothing.. I can't play music through iTunes to watch videos, no sound at all. I can change the volume up and down but no sound at all will come out. now, if I connect my computer through a thunderbolt cable to HDMI to the TV then I can send the sound to the TV and it will play, weird. I will call Apple tonight after work, anything I should try before? What could it be the issue? Anyone?