Handy

Handy is the only Atari Lynx emulator for Mac OS X. Handy was the first emulator on the Macintosh to support the use of compressed ROM images, an idea which has since been adopted by just about every other emulator out there.

Handy cannot run without a copy of the original Atari Lynx BIOS. The app has support for screen rotation (Gauntlet Third Encounter, etc).