Download MacCPUID

MacCPUID is a developer tool used for displaying information collected from the microprocessor via the CPUID instruction. The CPUID instruction returns information in the general purpose registers such as manufacturer identification, a processor's family, model, and stepping numbers, supported features (e.g. SSE, SSE2), cache information, and many others.

Download MacCPUID V2.2:

Downloadapplication/x-apple-diskimage maccpuid-2.2.dmg2.5 MB
For more complete information about compiler optimizations, see our Optimization Notice.


Interesting, I have a macbook pro with an identical processor as my acer aspire (core i5 430m 2.26GHz) CPUID/CPU-Z on Windows 7 shows 2 cores 2 threads per core with 4 logical CPUs on my macbook, using this tool, I see 8 cores 2 threads per core at 16 logical CPUs... How can this be?

Please try download the 10MB .DMG linked to on this page. It should have the updates you're looking for.