System 3.3

System 3.3 is like System 3.2, just with minor bug fixes and feature improvements. It was released with Finder 5.4 in January 1987 as part of the AppleShare Work Station installer disk, for the Mac 512k. Interestingly, it was introduced at the same time as System 4.0, marking the first time Apple updated a previous version of the System while releasing a new feature version.