Mac System Software 1.0 1983-10-04 build

Mac System Software 1.0 1983-10-04 is a build of the macOS which adds folder functionality to the OS and updates the "@" to a Apple logo. This build has a different finder from the Mac System Software 1.0 1983-07-05 build, which was known as Sony Test 6.9. The finder icon in this builds resembles that of a zombie.