iMac internal mic not working
Perhaps a couple months ago, I had trouble using Skype: the other party could not hear me. Last week I was trying to test up to use another video conferencing system that provides a video & audio test in set up prior to use. Could not get any vu-meter response on mic test. Tapping on the iMac case showed signal to the vu-meter.
Is there any way to test for certain this is a hardware problem? Can there be a software/OS problem here, like a corrupt driver or .plist etc? (Running OS 10.10) What about an external mic: who has had success with using that instead?
Thanks!
iMac, OS X Yosemite (10.10.5), 2.8Ghz i7, 21.5in, 8GB, HP P2015dn