Sound keeps muted, iTunes doesn't play songs
Sinds a week or two sometimes when I boot my mac my sound doesn't work. My sound keeps muted and I can't turn the volume up because it's unclickable grey.
Someone told me to do the "cmd + ctrl + n + v"-trick and that sometimes helps me but the problem keeps coming back. Also iTunes doesn't want to play my songs, it keeps stuck on 0:00.
In my sound-systempreferences everything seems okay.
My specs are:
- iMac mid 2012 running OSX lion 10.7.4
- Processor 3,4 GHz Intel Core i7
- Memory 12 GB 1333 MHz DDR3
- Video AMD Radeon HD 6970M 2048 MB
iMac, Mac OS X (10.7.4)