System 4.2, was released as part of System Software 5.0 (not to be confused with System 5, which never really existed), alongside Finder 6.0. It met the Macintosh public in October 1987. Apple started to use "System Software" version numbering with this release of the Macintosh system software to indicate a specific software bundle release. Previously, users had to track the System and Finder versions separately, which caused confusion regarding which versions worked well together. A "packaged" name for the combined System and Finder took a lot of this guesswork out of the equation.