Mac System Software 1.0 1983-07-05 build

Mac System Software 1.0 1983-07-05 build was found on a Sony 3.5 inch floppy disk and is dated 1983-07-05. The GUI is called Flounder 4.4. It has a picture of a Twiggy disk instead of a Sony disk for the background. The disk is supposedly called Mac 16D0 by the text at the top of the floppy disk. There are 3 programs on this disk that work and they are, Disk Duplicator, Format-Copy Utilities, and a program called "sonytest". Format-Copy Utilities has 3 different versions. It also has a tendency to crash and also an even more tendency to crash when you click on "Finder" in the crash dialogue box. It is the earliest available build of macOS so far.


 * Do It: Runs the program that you selected.
 * Info: Shows the file number and how much space it takes up.
 * Copy: Makes a copy of the selected program.
 * Rename: Renames the selected program.
 * Remove: Simply removes the program.
 * Eject: It ejects the disk from the machine.
 * Drive: Switches to the external drive.