Mac OS X version 10.2 "Jaguar" was the third major release of Mac OS X. It included new features like Address Book, Bonjour for device discovery, and improvements to applications like Finder, Mail, and Sherlock. Jaguar was well received for improvements in stability, speed, and available applications, though some criticized remaining interface speed issues. It was supported on Power Mac G4/G3 and PowerBook G3/G4 systems with 128MB RAM or more.