As our MAC viewer software is not available through the Mac app store, you need to allow third party apps to run on your device.
To do this;
Open System Preferences
Click into Security and Privacy
At the bottom of the window there is a section titled Allow apps downloaded from. Please change this to Anywhere. If this is greyed out or disabled, please click the padlock in the bottom left of the window first to allow the settings to be changed.
The first time you run the iRoad Viewer you will be shown a warning saying that the app was not downloaded from the app store. To continue, please click okay/open.