System 7 Tune-Up 1.1.1 is a minor OS upgrade Macs running System 7.0 or System 7.0.1. Version 1.1.1 of the System 7 Tune-Up corrects a mysterious situation where folders, after having files dragged from floppy drives that underwent several complex and random operations, started disappearing (or becoming invisible), taking all other folders further down the alphabet (in terms of name) victim.