My current PC laptop is getting ready for replacement and Im considering switching to a MacBook laptop. Before making the plunge, I have a few questions: 1. I have a lot of school work, music, etc. on an external hard drive that is formatted for windows. Can I plug this into a Mac via usb and still access/edit the data? 2. Some of the software that I use (MathCAD, etc.) is only available for PC. Is there a way to reliably run this software on a Mac? Is there special software that would have to be purchased to do this? Would I still be able to use basic software functions such as printing etc? 3. I do have some time before making my purchase. Will the MacBook line be updated fairly soon with faster hardware/software that is worth waiting for? Thank you very much for any suggestions you all might have.