iBench: The Cocoa Benchmark
iBench is a synthetic benchmark for the Mac OS X operating system.
iBench is constitued by 21 tests (12 of integer workload and 9 of floating point) of real usage that allow to check and compare the CPU and memory performance of your Mac.
For Intel and PowerPC (Mac OS X 10.5, 512 MiB of RAM required).
Download: iBench 1.0.3 for Mac OS X