The 15-inch Apple MacBook Pro MC371B/A Refurbished Laptop is equipped with a formidable 2.4 GHz Intel® CoreTM i5-520M Processor, and runs the Mac OS X v10.6 Snow Leopard operating system. This sleek laptop comes with a generous 320GB hard drive, and is installed with 4GB of RAM - upgradeable to a maximum of 8GB.