Western Digital 160gb hard drive preloaded with El Capitan 10.11.6 final version,
Specifically programmed for Mac Pro 2006/2007 1.1, 2.1
This is a great way to update your Mac Pro, you must have a compatible graphics card like an HD 5770 1GB but a 8800GT 512mb does work
Please make sure you have at least 8 Gb ram.
Free Apps included and free postage 1st class signed for.