Hello. I have a 2012 imac 21" with SSD that no longer wakes from sleep now I have installed ML. I have tried unplugging it for 5 minutes then restarting to no avail. Can anyone give me some ideas on how to fix this? I am using an apple mouse, keyboard and trackpad.
I have the same issue and same IMAC. I have contacted service but what they had me do did not fix the issue. Definatly a Mountain Lion Problem because everything was great before I installed the update.