This is the original install CD for the Umax S900 Series SuperMac clones, version 2.0 - It contains a full Macintosh System install of Mac OS 7.5.3L. Why the system version is 7.5.3L? Because this version is specially designed for Macintosh clones only.
Top download above contains a zip compressed .toast image
MD5 Checksum: BCCC921598DD2E22B9A26F33E87A50B9 *UMAXS900CDv2.ZIP
Additional Software Included on the CD:
The included SSW 7.5.3 is perhaps the easiest system of this era I've had to install. Usually I've installed from those multiple parts for 7.5.3 from Apple - This was totally painless to install in comparison, using this CD. Hense, it still good to run on SheepShaver.
However, this CD doesn't boot at all on Basilisk II, because it were based on Power Macintosh PCI system software.