This free Mac OS X "Legacy" player was designed to open and play all your old stacks, including those made using HyperLogo.

Virtually all stacks made using HyperStudio 3.0 to 4.5 should open and run correctly. The HyperStudio 5 Legacy Player runs on Mac OS X 10.3.9 - Mac OS X 10.5.8 (Not for Intel-based Mac computers.)