Dia 0.97.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The most popular versions of the program are 0.97 and 0.9. Dia for Mac is categorized as Design & Photo Tools. This free Mac app was originally designed by Dia. The common filenames for the program's installer are dia-0.97.2-3.dmg or dia-0.97.2-7.dmg etc.
From the developer:
Dia is a program to draw structured diagrams for Mac.
Dia supports more than 30 different diagram types like flowcharts, network diagrams, database models. More than a thousand readymade objects help to draw professional diagrams. Dia can read and write a number of different raster and vector image formats. Software developers and database specialists can use Dia as a CASE tool to generate code skeletons from their drawings.
You may want to check out more software for Mac, such as Diashapes, digiesp or Ludo 3D, which might be similar to Dia.