However, if you just need to view or edit a DWG file quickly, try (formerly AutoCAD 360). It runs in your browser (Chrome/Safari). The free tier is very limited, but it allows basic viewing, redlining, and light editing without installing anything on your Mac.
Avoid. High security risk.
Autodesk offers a robust Education Community program. If you are a currently enrolled student or a teacher, you can get AutoCAD (and the Mac-specific version) for free for one year, renewable as long as you remain eligible. autocad for mac for free
