Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon.
Already running OS X Snow Leopard 10.6.6 or later (10.6.8 recommended). Memory: At least 2GB of RAM . Storage: At least 7GB of available space . How to Install Mac OS X Lion 10.7.5 Free Download
Before downloading, ensure your Mac meets these minimum specifications: Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon