Download of XHSI 2.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X is an intellectual property of Georg Gruetter. We recommend checking the downloaded files with any free antivirus. The application lies within Games, more precisely Simulation.
From the developer:
XHSI (Navigation Display for X-Plane) is an add-on for the X-Plane flight simulator. This program simulates a Navigation Display (Horizontal Situation Indicator with moving map) styled after the Boeing 737-NG series, but can be used with any X-Plane aircraft.
You may want to check out more software for Mac, such as Kudos Rock Legend, PlantTycoon or Fashion Fortune, which might be related to XHSI.