Complex sentence: Mac OS X v10.6 also featured new 64-bit technology capable of supporting greater amounts of RAM, improved support for multi-core processors through Grand Central Dispatch and advanced GPU performance with OpenCL.
Split into simpler sentences: Mac OS X v10.6 also featured new 64-bit technology capable of supporting greater amounts of RAM. Back-end platform changes included improved support for multi-core processors through Grand Central Dispatch and advanced GPU performance with OpenCL.