Topic summary
Mac OS 8.5
Extracted from the Wikipedia article Mac OS 8.
Mac OS 8.5
Released October 16, 1998, Mac OS 8.5 was the first version of the Mac OS to run solely on Macs equipped with a PowerPC processor. If Mac OS 8.5 is installed on a 68k system, the Sad Mac error screen will appear. As such, it replaced some, but not all, of the 680x0 code with PowerPC code, improving system performance by relying less on 680x0 emulation.