A: Mac OSX is set to not allowed to install Apps outside the App store by default. That is why you will receive the error of 'unidentified developer'. In this case, you just need to change the settings to make it work by clicking System Preferences > Security & Privacy > General > Allow applications downloaded from > Anywhere.
A: This maybe caused by the media files or system settings.
1.Please make sure you have the right DRM media files downloaded and authorized to play on your machine, otherwise it won't work.
2.Go to iTunes > Preferences > Advanced to check whether the option of 'Share iTunes Library XML with other applications' is checked or not. If not, please check that option and open DRmare software again.
A: Sometimes if the system update server is busy, 'Check for Updates' may not work well. In this case, you can simply go to the download center of DRmare site to download the latest version of the program to update manually.
A: Our software DRmare M4V Converter can do that, please choose the output format as MP4(lossless) or M4V(lossless), then the output video quality will be preserved with 5.1 surround audio tracks and CC subtitles.
A: DRmare M4V Converter only works for the DRM-protected M4V videos on iTunes which are authorized to play play on your computer. Otherwise please log in to your iTunes account and try again to authorize it to play.
A: We are sorry that currently DRmare M4V Converter for Mac doesn't fully support macOS High Sierra yet. Our programmers are working hard on it now. But since the problem is too complicated, we can't estimate when the fix will come. Therefore, before the solution is found, we'd suggest you downgrade macOS High Sierra to Sierra. Alternatively, if you have any Windows PC, we'd suggest you go for the DRmare M4V Converter for Windows. If you already purchased the Mac version, we'd like to switch your code to Windows for free until the Mac issue is fixed.