So..apple couldn't help me via phone but I hope someone can understand my issue I'm having. Lately, when I'll leave my Mac alone (standby) for few mins eventually it will go completely black or in hibernate mode. Then normally you can resume by clicking the mouse or hitting a key and they desktop will appear. However, in my case..when I hit a key or click the mouse, nothing happens..it remains black & I'm forced to manually restart by holding the power button and obviously this isn't good for the hard drive. If someone could please help me or point me in the right direction, I'd appreciate it very much.