We're still unsure as to whether or not Apple's rumored Mac update smorgasbord will come to pass at WWDC, but if any of it pans out, it looks to be the almost mythological Mac Pro update. A trio of model numbers for a "K5BPLUS" have popped up that 9to5 Mac claims are the base, mid-range and high-end configurations for the long-sought workstations. The part numbers don't include details, though talk of similar pricing to what we know today would poin