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.
 * 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.