CadMac - CadMac — open-source 2D CAD for macOS

Features Drawing — line, polyline, rectangle, circle, arc, ellipse, point, text & multiline text (MText), splines. Dimensions — linear, aligned, radius, diameter, angular. Hatching — solid and pattern fills, boundary detection from closed areas. Blocks — block definitions, inserts and attributes (ATTDEF). Modify — move, copy, trim, extend, fillet, chamfer, offset, array, join, align, overkill, groups. Precision — object snap (OSnap), grid, ortho & polar tracking, undo/redo. Layers — full layer management with colors and linetypes; paper-space layouts & viewports. File formats — open & save DWG (native reader/writer, no external converter) and DXF; PDF / print output. GPU rendering — Metal-accelerated canvas that stays smooth on large drawings. Automation / MCP — a built-in Model Context Protocol server (cadmac-mcp) lets Claude and other AI tools read the drawing, add and modify entities, measure, count blocks, and extract quantities — ideal for BOQ / takeoff workflows.