The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project
developer of Bravo, the first GUI word processor, which was developed at Xerox PARC. Simonyi started work on a word processor called Multi-Tool Word and soon
iChat backdrops) an Intel processor is required: Processor: any Intel processor, or PowerPC G5 or G4 (867 MHz and faster) processor Optical drive: internal