I have seen claims that iMovie HD can be used beyond OS 10.8. One of the claims is that you can modify Exceptions.plist so that iMovie HD will open. This does indeed allow one to open iMovie HD, but it doesn't work properly. After modifying the plist under OS 10.13, I opened an iMovie project and imported a digital video file. It looked good at first, but then I realized that the video appears black when played back (but the audio works). There was another claim that an unofficial version of iMovie works beyond OS 10.8. For that version, there is no need to modify the plist file. I tried that version and had the same problem with the video appearing black. Is there an additional step that needs to be done? Or are claims that iMovie can be used beyond OS 10.8 misleading?