ConceptDraw PRO Alternatives for Mac OS X

Lucidchart is a web-based application to draw diagrams.

Dia is free and open source drawing software.

yEd is a free general-purpose diagramming program with a multi-document interface.

Pencil Project is an open-source GUI prototyping tool.

LibreOffice is a full-featured office productivity suite that provides a near drop-in replacement for Microsoft Office.

OmniGraffle is a diagramming and digital illustration application for macOS and iOS.

Creately is a collaborative diagramming and design software used by teams around the world to communicate more effectively.

Axure RP is a wireframing, rapid prototyping, documentation and specification software tool aimed at web and desktop applications.

Edraw Max is comprehensive mind mapping and planning tool network diagrams, floor plans, workflow diagrams, business charts, and engineering diagrams.

Nevron Draw is a software for creating flowcharts and diagrams.

Diagrammix is a tool for efficiently building attractive diagrams and flowcharts.