Hello, I have an old 17" white iMac, probably at least 10 years old. It hasn't been used in a few years. I am downsizing and need to get rid of it. I am trying to figure out a way to format the hard drive for obvious reasons before getting rid of it, but for some reason it only boots into Windows, and secondly, I cannot get it to pair with any bluetooth mouse or keyboard. I suppose I will have to find a wired mouse and keyboard to use with it...but even then not sure how to go about formatting it. Is it just a matter of inserting a Leopard or Snow Leopard disc into the CD drive, booting from the disc and then erasing the hard drive? Thanks so much!