Mac users interested in Igs viewer generally download:
Cross-platform and easy-to-use CAD software. It provides quick import and export of 2D/3D formats, measuring and section tools. CST CAD Navigator supports AutoCAD DWG, DXF, PLT, SVG, CGM, STEP, IGES, STL, SLDPRT, X_T, X_B, and other formats.
Additional suggestions for Igs viewer by our robot:
It is a 3D and 2D Goban, game viewer and editor, client for IGS-PandaNet and interface for GNU Go.
viewer and editor, client for IGS...Client for IGS-Pandanet Support
MacVector Converter can convert MacVector files to the other formats.
Fasta, Mase (= IG, Intelligenetics), NEXUS