BluePrintTools-Pro 2.1 for Mac can be downloaded from our website for free. The application lies within Design & Photo Tools, more precisely General.
From the developer:
BPT-Pro let you draw simple blueprints, design with dimension lines or even measure over a curved line. BPT-Pro consists of 13 high quality tools, accessed through the Illustrator toolbox, with a convenient information toolbox, giving users the familiarity of the Illustrator interface. BPT-Pro not only can display measurements of all or parts of segment dimensioning but also measures free curves.
You may want to check out more software for Mac, such as Mac Journal, Start FlowSpace Developer Client or Architekt 3D Gartendesigner, which might be related to BluePrintTools-Pro.