Hi , I've juste prepare my usb key with this tutorial The Always Up-to-Date Guide to Building a Hackintosh [OS X 10.7.3 UniBeast]. I'm using osx lion 10.7.3. The problem is that after start the key It stays on the pre loading of the installation ( the one with the apple logo and the liltle circle at the bottom. There is also a liltle white square in the middle of the screen with a grey circle with a grey bar on it . Idk if you can help me. Thanks !!