Mac System Software 1.0 1983-10-04 build

Mac System Software 1.0 1983-10-04 build is a beta build of the Mac System Software 1.0 which adds folder functionality to the OS. It is identified as Sony Test 7.0. The finder icon in this build resembles that of a zombie, and the icons for Untitled, Reversi, and its paper resemble Coke cans.