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MacCPUID version 3.1
Updated: August 10, 2018

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.

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For more complete information about compiler optimizations, see our Optimization Notice.