System 4.0

System 4.0, Finder 5.4 (System Software 2.01)

Aside from bug fixes left over from System 3.2 and System 3.3, there wasn't much of a change in System 4.0. The Finder wasn't even updated. In fact, System 4.0's major claim to fame would be the fact that it was the first System to exclude a model, the Mac 128k. It did have some fixes to accommodate AppleShare, like a new Chooser that looks remarkably like today's, and a new Control Panel with an AppleTalk section. System 4.0 was recommended for all Macs with 512k of RAM and higher, which means only the Mac 512k and above were able to run it. Not much more became of the System, since it was only current for that month alone.


 * Released: March 1987