Open Source PlantUML Alternatives for Mac
There are many alternatives to PlantUML for Mac if you are looking to replace it. The most popular Mac alternative is 
diagrams.net, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to PlantUML and many of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to PlantUML are 
Dia (Free, Open Source), 
yEd Graph Editor (Free), 
Freeplane (Free, Open Source) and 
Lucidchart (Freemium).
- diagrams.net (previously draw.io) is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams.
- Free • Open Source
- Mac
- Windows
- Linux
- Online
- Chrome OS
- Self-Hosted
It does not uses simple textual descriptionsYou can paste PlantUML text into draw.io and it renders it - Dia is a GTK+ based diagram creation program for Linux, Unix, Mac OS X and Windows released under the GPL license.
- Free • Open Source
- Mac
- Windows
- Linux
- PortableApps.com
- FreeBSD
- Xfce
- DragonFly BSD
- NetBSD
- OpenBSD
Dia does not use simple textual description. - Extensible, multi-platform mind mapping creation, analysis and presentation software.
- Free • Open Source
- Mac
- Windows
- Linux
- BSD
- Java
While mind mapping may fall into the category of "graphing application," it is *not* a replacement for software architecture diagramming and/or UML modeling. - Graphviz is open source graph visualization software. It has several main graph layout programs.
- Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool. It is also a non-linear presentation program.
Discontinued
The last commit to the GitHub repo was made on October 8th, 2015.
- Free • Open Source
- Mac
- Windows
- Linux
- Gephi is an open-source software for visualizing and analyzing large networks graphs.
- Free • Open Source
- Mac
- Windows
- Linux
- An easy tool for generating diagrams and flowcharts from text in a similar manner as markdown.
- Umbrello is a Unified Modelling Language (UML) modelling tool and code generator.
- Graphical modelling open source UML2 tool based on Eclipse environment.
- Bonita BPM is a BPM-based application platform that is designed to help users build highly engaging, personalized business applications that can be continuously updated to adapt to business changes in real time.
- Free • Open Source
- Mac
- Windows
- Linux