Mac users interested in Autocad os x 10.5.8 free generally download:
Design and shape the world around you with the powerful, flexible features in AutoCAD 2013 software, one of the world’s leading 2D and 3D CAD design tools. Maximize productivity by using powerful tools for design aggregation and documentation, connecting and streamlining your design and documentation workflows.
Create and modify 3D models and 2D sketches on your Mac. Generate 2D layouts, enable real-time visualization, collaborate on your projects with other users and store your designs in the cloud to access them from any device. Import files from other Autodesk programs in SAT, STEP, DWG and Autodesk Inventor formats.
AutoCAD brings robust 3D free-form design tools and powerful drafting capabilities to your platform of choice. It takes full advantage of the Mac OS X platform, with an intuitive, graphical user interface that makes it easy to bring your ideas to life.