I need your help.
I bought a Mac Pro in September, 2014. I had problems of re-starting the computer after sleep mode. I find three wired things. 1) After the computer was asleep for a while, I opened the lid and it took long time to show me the log-in window. 2) When I was using the Mac Pro computer, the screen suddently became black. Then I closed the lid and opened the lid again. It took long time to show me the log-in window. 3) When I am not using the computer, the computer automatically switches to asleep. Then when I try to start up again, it usually takes me long to start up again, sometimes, I have to close the lid and open the lid again to be able to start the computer up.
Here is my computer information:
Please help me!
Thank you
Yannan from Halifax