Revisions to the Mac OS have recently come at a rapid rate. Mac OS 9 includes over 50 new features and enhancements to the Mac OS. Among them are Sherlock 2, Keychains, Custom password-protected environment for multiple users, voiceprint verification, Internet Integration, AppleScript 1.4 and automatic upgrading. All of these new features are covered in depth in Mac OS 9: The Complete Reference. This unique coverage offers a logical and sequential approach, using questions, answers and step-by-step instructions, along with helpful sidebars and encompasses all the major elements of Mac OS 9 installation and use, starting with a list of changes from previous versions of Mac OS.