I searched for mac ERD software for a while, and couldn’t find anything but crap, crap ports, over-built (for my needs), or $100-$500 a license software.
Of course there was a ton of windows apps, but not for OSX.
I had to turn to stackoverflow for help on this one and thanks to sfinnie from Scotland found an obscure, fantastic piece of software called yEd Graph Editor.
http://www.yworks.com/en/products_yed_about.html
Here’s the current state of the new Grove software that will also share a common ground with upcoming Anuva software.
This gets better and better!
Yuji Tomita 
Thank you very much for your information~!
The software is really good!
Can you reverse engineer an existing SQL Server database with yEd to create an ERD after the fact?
Hey Wanda,
I’m sorry but I have no idea. My criterial specifically didn’t involve reverse engineering features for simplicity. I wanted a pen and pencil replacement : )
If you can’t find answers to your question on google, I’d highly recommend checking out stackoverflow.com
Good luck!
I dont know if you knew this but you can create ERD diagrams with Lucidchart after the fact by exporting your database schema to Lucidchart via the ERD shape library import function. It doesn’t generate the diagram but it does create a new library with the tables in it. If you drag out tables it will auto detect FK relationships.
Thank you ! Just what I was looking for !
Cheers, you made my day. That is what I was looking for too.
Great pieces of software works fine!
Thanks – you really helped me
thanks bud. this is what I am looking for
Thanks for sharing!
thanks to Alloh,very helpful
Creately is also a platform independent, cloud-based diagramming software to draw many types of diagrams. Can be used for UML data modeling as well. Just a addition for your valuable post. Thanks for sharing!
thank you, great source !
thanks, this is what i’m looking for