Our software library provides a free download of PostGIS 9.3.3 for Mac. Postgis-1.5.3.tar.gz is the most frequent filename for this application's installer. The most popular version among the program users is 1.5. The size of the latest downloadable installation package is 3.6 MB. The actual developer of this free software for Mac is OSGeo project. The program lies within Developer Tools, more precisely DB Tools. Our antivirus scan shows that this Mac download is clean.
From the developer:
PostGIS adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS "spatially enables" the PostgreSQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS), much like ESRI's SDE or Oracle's Spatial extension. PostGIS follows the OpenGIS "Simple Features Specification for SQL" and has been certified as compliant with the "Types and Functions" profile.
You may want to check out more Mac applications, such as uDig or Thuban, which might be similar to PostGIS.