Hi all, I´ve just bought an i5 iMac, and i´m trying to install windows 7 via USB. I´ve installed refit and made my 8 GB pen drive bootable. When i restart my computer, my usb appears as bootable, but when i select it to start windows instalation, my screen goes black and this message shows up: Insert a bootable device, and press any key. The thing is, that 2 hours ago, i´ve installed windows 7 following the same steps on my MacBook intel core duo 2.0ghz unibody, and worked fine! Please, can anyone help me??