- Hold down the Option key and choose System Information or System Profiler from the Apple menu.
- Select the Hardware section of the window that appears.
- Locate the Processor Name.
- 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 |