Mac OS 7.5.3 Disk Tools 1 disk with patched "Apple HD SC Setup" This is a Disk Copy 4.2 floppy disk image. It must be written back to 1.4MB floppy media. Use either Disk Copy 4.2, or Disk Copy 6.3, or ShrinkWrap 2.1, or DiskDup+ to write this image file back to floppy disk. This floppy disk will start up any 68k Macintosh capable of booting System Software 7.0 - 7.5.5 and has a SCSI Hard drive as standard. It contains a patched version of "Apple HD SC Setup" which can format any SCSI HD, even those without an Apple EPROM. "Apple HD SC Setup" requires Mac OS 7.5.3 or newer to run, hence it's inclusion with this boot floppy. MTT: 2017/11/17