There are a couple of different issues that you have. The first is using a non-ibm branded internal wireless card. That can be done but requires a BIOS hack to get around the error. There's an extensive explanation on the thinkwiki website. I recommend getting an external USB ralink wireless adapter. Here's a link http://www.ralinktech.com/en/04_support/support.php?sn=502 to the OSX drivers. You may notice that the older PCI drivers are not supported on recent versions of OSX. Don't get one of those.