Random black screen on iMac i5.
Hi, on my iMac i5 everything has been working fine until a couple of days ago;
Now, when I boot it in the morning it runs for about an hour before the screen goes black. If i try to awake it nothing happens unless I wait for 20mins+. Then the same happens - works briefly then black screen.
The computer is still working as I can access the files from my other Mac whom I am sharing files with.
I have done a PRAM & SMC reset but it hasn't really made much difference.
Can anyone help?
iMac (27-inch Late 2009), OS X Mavericks (10.9), Xcode based projects not working.
