OS X Mountain Lion was officially unveiled on Monday, and is shipping in July -- but conspicuously absent from the list of features is Apple's ad-hoc supercomputer tool Xgrid. Apple's Xgrid provided network administrators a means of constructing a Beowulf cluster, allowing them to use computer idle-time to drive calculations that can be divided into smaller operations. Xgrid client has been installed in all computers running OS X 10.4 or greater by default, so installation and configuration of a massively parallel grid was completed with little time or money outlay. The job controller is inclu