how can i update my mac os x 10.7.5
macOS macOS can be updated using the Mac App Store application[153] or the softwareupdate command line utility. Until OS X 10.8 Mountain Lion, a separate Software Update application performed this functionality. In Mountain Lion and later, this was merged into the Mac App Store application, although the underlying update mechanism remains unchanged and is fundamentally different than the download mechanism used when purchasing an App Store application.
MacBook Pro On June 11, 2012, Apple showcased its upgraded Mac notebooks, OS X Mountain Lion, and iOS 6 at the Worldwide Developers Conference (WWDC) in San Francisco.[53] The new MacBook Pro models were updated with Ivy Bridge processors and USB 3.0 ports, and the default RAM on premium models was increased to 8 GB.[54] Following this announcement, the 17-inch model was discontinued. After a media event on October 22, 2013 Apple discontinued all second generation MacBook Pros except for the entry-level 2.5 GHz 13-inch model.[55] Apple discontinued the 13-inch 2nd generation MacBook Pro on October 27, 2016. Prior to its discontinuation it was Apple’s only product to still include an optical drive and a Firewire port, and only laptop with a hard disk drive and Ethernet port.[56]