Hi, I have a close friend and colleague who recently bought a unibody macbook. He claims to have discovered via benchmarking cpu frequency that leopard is underclocking the cpu of his machine from 2.4 ghz down to 1.2 ghz. He claims that this is apples band-aid solution to heat problems with the logic board and the aluminum enclosure. I can't imagine that this is true- it would be fraud on a massive scale, and it seems to me that someone would have nailed apple for this already. Does anyone know anything about this issue? I am still waiting for apple to replace my laptop, so I am unable to run any tests to confirm/disprove this (additionally, my last machine was still running tiger, so I have never run any benchmarks in leopard to compare with tiger). I'm not super knowledgeable about this, but perhaps some folks out there who can test both leopard and tiger on similarly speced machines can use sysctl -a | grep cpu to check cpu frequency difference between the two operating systems it just occurred to me that this probably has to do with leopard's implementation of Intel's speedstep. Does anyone know if leopard handles speedstep differently from tiger?