SysTools DMG Viewer can be used to view and open open Mac OSX DMG files in Windows. It lets you preview email files within a DMG. This program shows a hierarchical structure of files arranged in the preview pane. Selecting the files or folders will give a preview of emails with details like Name, Created date, Size (in MB), Modified Date, and Last Access Date on right pane. You can double click the file , to preview the DMG File items within the preview Pane. You can view EML, EMLX, TXT, GIF, and HTML file types using this software.