Apple's latest Mac Pro, jammed with multicore Nehalem-based Xeon processors, is designed to be a computing beast with power to spare for the most demanding tasks. Since the current Mac Pros became available in October of 2009, though, numerous users have reported a glitch, which appears to be related to audio processing, that causes those Xeons to run much hotter than expected. The problem also saps a surprising amount of performance as well.