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Официально так :
For business-critical server deployments, Snow Leopard Server adds read and write support for the high-performance, 128-bit ZFS file system, which includes advanced features such as storage pooling, data redundancy, automatic error correction, dynamic volume expansion, and snapshots.
- http://www.apple.com/server/macosx/snowleopard/
ZFS быть ! 
Еще один момент - OpenCL (Open Compute Library) :
Another powerful Snow Leopard technology, OpenCL (Open Compute [...]