- Based on Forth with extended object-oriented features
- Interactive development environment provides for fluid and productive programming by allowing quick testing and modification of small code segments
- Comes with a large class library supporting many Smalltalk-like classes
- Seamless integration of Macintosh Toolbox calls
- Supports AltiVec and external frameworks such as OpenGL and Mach-O
- Some bugs have been fixed.
- OS X 10.6 or later