I have a new Toshiba external hard drive that I purchased on black friday. It works on my windows PC as well as my friends Macbook Pro. However it does NOT work on my brand new macbook pro. It was originally formatted NTFS but i reformatted it for exFat. Still doesn't work on my mac. The drive doesn't show up in finder or disk utility. I've heard rumors that macbook pros cannot power bus powered external HDs, but this doesn't make any sense considering my 3 year old dell and my friends MBPro finds the hard drive. Any suggestions? I really need to get this working.