4 Replies Latest reply: Dec 10, 2013 5:25 PM by CrowdedBlouse
Emily Kessler Level 1 (35 points)

I'm writing on behalf of my parents who own an iMac and frequently call me for tech support.  This problem has me boggled. 


They have no sound, except when we go into System Preferences and test the sound there.  Then we can hear the alert sound.  But, when in any application, there is no sound.  We streamed YouTube videos - no sound.  We checked email (preferences are set to use sound when an email arrives), but still no sound. 


I have no idea what to try next. 



MacBook Pro, Mac OS X (10.7.2)