ACSLogo is a Logo Interpreter for Mac OS X.
Logo is a popular language used to teach simple programming by guiding the progress of a ‘turtle’ which moves around a graphics screen:
A new version is available (October 2019) — 1.6. This version is required if you're moving to macOS Catalina, see Release Notes.
Simple commands can be used to make the turtle move in a straight line or change direction, and complex patterns can be built up from the simple commands using procedures and recursive techniques:
Graphics can be exported as TIFFs, JPGs, PNGs, PDFs or SVGs.
ACSLogo requires macOS. The current version, version 1.6, requires Sierra (OS X 10.12) or above.