Hello everyone, I'm new to this forum. I installed Mac OSX Snow Leopard 10.6.6, for the entire installation goes well, he will turn on and everything is fine, but as soon as I turn it off and power back up it gives me an error message telling me to hold down the power button until to which he turns off and then press the start button, I've done it a dozen times, but will not start. I installed Mac OSX Snow Leopard 10.6.6 on an Acer Extensa 5635Z. If I load the photos taken on everest made on my pc you you tell me that I have to choose when you choose to customize the installation, or the version that is suitable to my pc with the link from where should I download? Thanks in advance.