I would kinda beg to differ. I just got a mac pro that I upgraded to mavericks, then parallels 9 since 7 for some reason stopped showing more than 1 cpu and I just did not have the patience to solve the problem. I took my win xp hard drive partitioned as c and d and installed it in the mac. I can get parallels to treat it as a boot camp partition even though it is not, and best of all, I was able to import the entire hard drive to a vm!
I love this product.
Mike