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 V2.1.1:

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For use on my Mac Pro 8-core 3.0 GHz Xeon
16GB-Ram 1.8TB-HD
sse4 not detected!!!!
unsupported 45nm CPUs
Please try download the 10MB .DMG linked to on this page. It should have the updates you're looking for.
this is great, downloading the 10MB version, thanks :)
Very detailed information about the system processor and even better explanations on all the data.
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?
Hi. We have identified the issue and we are working on it. Thanks for reporting the issue.
Can this tool determine whether VT-X is enabled? Is there another Intel tool that can determine this?
worked on iMac 8.1 (early 2008)
Hello! for some reason it did not work on MacOS 10.5.8, both on xServer and MacPro.
OS Version: Mac OS X Server 10.5.8 (9L34)
Report Version: 6
I wonder if there is a newer version of the tool?
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