Hi, i am trying to reinstall Maverick OS for my imac. But when i try to open the Recovery partition, my Mac will just shut down or just reboots. Even when i try, to do a Internet Recovery with "cmd+r" the Mac will just shut down. I bought this imac with Lion, upgraded to Mountain Lion and now Maverick. I whant to do a clean install again, with Maverick but i can't because of the recovery issue. Does anyone have a idea what i could do, to get this fixed?