| Type | operating system, Classic Mac OS |
|---|---|
| Developer | Apple Inc. |
| License | proprietary license |
| Predecessor | System Software 5 |
| Successor | System 7 |
| Introduced | 1988 |
Sources: Wikidata (CC0) · Wikidata Q420785
Operating systems · 1
| Operating system | Developer | First release | License |
|---|---|---|---|
| System 7 | Apple Inc. | — | proprietary license |
Operating systems · 1
| Operating system | Developer | First release | License |
|---|---|---|---|
| System Software 5 | — | — | — |