Video / Audio out of Sync I'm using latest Sierra Zone (iMac 14.2). My pc configuration is core i3 2100/6gb ram/nvedia210 1gb/1TB HDD. Nothing is modified after install Seirra Zone. Now problem is when im playing movie or video song or any audio song, after 15-20min the audio video become out of sync. even I quit the player the audio play for 2-3 sec. I have tried Mplayer Extende, VLC but same problem. I didnot modified anything. for that I need help if any fix is available please help me.