7 Replies Latest reply: Apr 29, 2013 3:17 PM by pinkbubblebath
tekkie50 Level 1 Level 1 (0 points)

Hello,

 

I have an iMac 27" OS X 10.7.5

 

I have a standard home stereo connected via the headphone/mini jack output. Sometimes I swap over to Bose noise cancelling headphones, also with the mini jack.

 

When any audio is playing, the humming is not present. After 30 seconds of no audio (i.e. when iTunes stops playing a song, or Safari stops playing a Youtube video) the humming starts. It sounds like a 60hz mains hum to me. It occurs without fail at exactly 30 seconds on both the stereo system and the headphones very time after no audio.

 

Someone must know how to change this exceptionally annoying feature?

 

Thanks in advance!


iMac, Mac OS X (10.7.5)