These are the setup drivers for Apple Hard Disk SC Setup Disk version 1.2.1, SCSI disk drivers. Presumably they are intended for use with the "Apple Hard Disk 20SC" external hard drive, but they may suit other earlier SCSI hard drives of the late 1980's, too. As this driver set is from mid-1987 they are likely to be used also with the three models introduced in that year: 40SC, 80SC & 160SC.
A bootable 800K Disk Copy 4.2 disk image, compressed as .sit archive using StuffIt 3.6
MD5 checksum & filename: 29c186d0a0f7934b0c5b0b2fadb018c2 *apple-hdsc-setup-121.sit
Utilities included on the disk installs a new Control Panel, Chooser, Find File and Key Caps. The Alarm Clock, Calculator and Scrapbook are updated if they are present on the disk. The install script also updates any Apple Printer resources on the disk and adds or updates these fonts: Times, Helvetica, Courier, Chicago, Geneva and Monaco.
CompatibilityBootable:
• System File vers. 4.1
• Finder version 5.5
Supports:
• Macintosh II
• Macintosh SE
• Mac Plus, 512Ke, 512K
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About the photo of the Hard Drive SC20 (pic 1 above):
This (photo) file is licensed under the Creative Commons Attribution-Share Alike 2.5 Italy license.
Attribution: http://www.allaboutapple.com/