How to tell if your Intel-based Mac has a 32-bit or 64-bit processor

Learn how to find out if you have a 32-bit or 64-bit Intel-based Mac.

This article has been archived and is no longer updated by Apple.
  1. Hold down the Option key and choose System Information or System Profiler from the Apple menu.
  2. Select the Hardware section of the window that appears.
  3. Locate the Processor Name.
  4. Compare your Processor Name to information below to determine whether your Mac has a 32-bit or 64-bit processor.
Processor Name 32- or 64-bit
Intel Core Solo 32 bit
Intel Core Duo 32 bit
Intel Core 2 Duo 64 bit
Intel Quad-Core Xeon 64 bit
Dual-Core Intel Xeon 64 bit
Quad-Core Intel Xeon 64 bit
Core i3 64 bit
Core i5 64 bit
Core i7 64 bit
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