Hey everyone , I am having trouble installing mavericks on my 1.1. I upgraded to 3.0ghz 8 core got 10gb memory an ATI 5770 hd card When I reboot and choose options. I select the USB and then get an apple and then the circle circle circle ... and that goes on for a really long time Actually, I don't see anything happening apart of the circle. does it take more than 20 mins to process and then start? I downloaded the Mavericks version from the app store on my macbook pro and installed on the USB via the SFOTT tool.