The Apple GS/OS is a disk operating system developed by Apple in 1988, especially for the Apple IIGS computer. The GS/OS has been publicly released on September 16, 1988, and was developed until version 4.02 released on May 6, 1993.
Apple GS/OS is a second operating system after Apple ProDOS 16, but first written entirely to support the 16-bit architecture used in Apple IIGS. The big change from the previous versions of ProDOS is that GS/OS contains many features of the Macintosh System. In practice, GS/OS has a Finder, loadable fonts, and plug-in device drivers like modems or printers.
Today Apple GS/OS is 33 years old!
Apple GS/OS General Information
| Released | September 16, 1988 |
| System Requirements | Apple IIGS computer |
| Distribution | Floppy disk |
Versions
| Version | Release Date |
| GS/OS 2.0 | September 16, 1988 |
| GS/OS 3.0 | May 1989 |
| GS/OS 3.0 | December 1989 |
| GS/OS 3.03 | December 1990 |
| GS/OS 3.03 | February 1991 |
| GS/OS 4.01 | March 1992 |
| GS/OS 4.02 | May 6, 1993 |