Installing Isabelle/HOL on macOS [isa-0014]November 30, 2025Liam O'ConnorGo to the Isabelle download page. Download the macOS DMG file. Open the DMG. Drag the Isabelle application into your Applications folder. Open Applications → Isabelle to start the Isabelle/jEdit IDE.(If macOS warns that the app is from an unidentified developer, go to System Settings → Privacy & Security and approve it.)