The 1.0 version of Maxwell for Mac is available as a free download on our website. The most popular versions of the tool are 2.7 and 1.3. You can run this free program on Mac OS X 10.6.0 or later. The unique identifier for this app's bundle is com.nextlimit.Maxwell. The application belongs to Lifestyle Tools. The actual developer of this free software for Mac is Maxwell App Team.
From the developer:
Maxwell is a graphical user interface-based tool for calculating heat loss and heat gain in a building. Gain and loss can be calculated for the building as a whole or on a room-by-room or zone-by-zone basis. This helps users to select HVAC equipment that is appropriate for the climate of Northwestern Pennsylvania.
You may want to check out more Mac applications, such as Maxwell's Dream, Skim by the Skim Team or iTeXMac, which might be similar to Maxwell.