TextureBuilder 1.0 for Mac can be downloaded from our website for free. This free software for Mac OS X is a product of Heiko Irrgang. The application lies within Design & Photo Tools, more precisely Viewers & Editors.
From the developer:
TextureBuilder is a freeware program to simplify the task of building several texture formats from 6 skybox images, like our Skybox Textures.
You can load 6 different images, representing the front, back, left, right, up and down-side of a cube and combine them to either.
You may want to check out more software for Mac, such as Smith Chart for Mac, Movie2Shot or TVPaint Animation, which might be related to TextureBuilder.