Mac Dmg not recognized error is troubling you a lot and because of that you are unable to install the software you need in the Mac system. Just like the exe file in the windows system the Mac OS X uses the dmg file for installing various softwares. But when you get Mac dmg not recognized error then you can not install and use the software. There possible reason for this error could be that the dmg file has gone corrupted so you need to get a fresh copy of that file and try to install that. If the program is stile not installing then you can check with other dmg file and see whether it is installing or not. If it fails then there must be the issue with the Mac OS X. So in order to fix Mac DMG not recognized error you have to reinstall the operating system and then use the dmg file. But some of the data may get lost from the Mac system in the process which you can get by using the time machine utility but if the time machine does not work use the Mac data recovery software. It is capable of performing complete recovery with simple and quick process. So download the software after you fix Mac Dmg not recognized error.