Looking through the log file provided, the error seems to be X-Plane failing to load aircraft resources, either the crash in the installer, or the computer just can't handle the aircraft. The computer being used seems dramatically under minimum specifications, it looks like a 2009 AMD CPU which could be the problem. Also, the log is reporting Windows 7 is being used, which is not supported by us. Windows 10 certainly is, I'm not sure what you are referring to with "most of the files have references to Apple" - we support both Windows and MacOS.
For integration, yes integration in the form of a popup window is already possible. Popup windows can be toggled when the G500 is loaded from the plugins menu bar -> G500. Integration into the 3D panel is more difficult, and typically requires access to the source objects from Carenado in that case. Attached is the integration guide pdf with the details.
RealSimGear G500 Integration Guide.pdf