A collection of information on how to implement distributed computing with Cocoa, i.e. write applications that solve a problem by dividing into many tasks, each of which is solved by one or more Macs.
The official Apple approach is (was?) Xgrid:
The Xgrid Programming Guide was last updated in 2007 so it’s probably safe to say that Apple is considering that as no longer appropriate.
A low-level Cocoa approach using distributed Cocoa objects with NSConnection can be found here: DistributedObjectsSampleCode.
libGlass is an actively developed library for distributed computing. It’s written in C++ and widely portable. Glass is POSIX compliant, and should work with any C++ compiler.