Dec 2 2008
A .DMG file is a file format for Macintosh OS X. This file is a disk image and is treated as a disk when opened. Its a very useful format for Macs but it be occasionally used on Windows computers. One Mac user asked why a Windows user would want to open a .DMG file since the contents are most likely useful on a Mac. These files would be opened if they are on a web site hosted by Windows 2008 Server. An attempt to download it would lead to a file not found error.
Now when you click on a DMG file on a web site, you will be prompted for a download location.