(There's no video for MacsBug 6.6.3 + 6.5.3 yet. Please contribute to MR and add a video now!)
MacsBugs v6.6.3 from summer 2000.
Second download is MacsBugs v6.5.3 from spring 1996.
macsbug663.hqx (500.61 KiB / 512.63 KB)
MacsBugs v6.6.3 (2000) / BinHex'd, use Stuffit Expander
MacsBug_6.5.3.sit (305.56 KiB / 312.89 KB)
MacsBugs v6.5.3 (1996) / compressed w/ Stuffit
Architecture: 68K + PPC
Emulating this? It should run fine under: SheepShaver