Hello, I would like to ask if is normal that my Macbook Pro 5,1 2.53 GHz C2D still runs at maximum frequency and appears like it doesn't use Intel SpeedStep. I've used 3 utilities: MacCPUID from Intel, CPU-X and CPU-Z in X11 over WINE. Always same result: 2,53 GHz, +- a few MHz. In Windows, Speedstep looks like it works okay, so it looks like something is wrong with Lion.(10.7.4) Thanks for reply, meme ------ I already sent this to Apple Support as bug.