The upcoming Mac Pro could have one of the largest spreads in performance in recent memory based on internal Apple documents obtained late last night. Shown as "Mac Pro (Mid 2011)," it should have four main models using Xeon chips, starting with a single-processor, six-core model and moving to an eight-core system, a 12-core (two times six) system and a 16-core (two times eight) flagship. The tip to 9to5 couldn't prove whether the designs would use a new rackmountable design.
