Fixing "No Mountable File System" Error in Mac OS X

In Mac Operating systems, Disk Mounted Graphics files are dealt like real disks. You can mount these image files as normal hard disk volume. This file format enables you file compression as well as well as it secures password and thus acts as both file distribution and security functions. You can easily create Disk mounted graphics files with the help of Disk Utility in Mac OS X 10.3 and later versions. You can easily access data from Disk Mounted graphics files after mounting them. However, in some cases, such files fails to mount and you can not access data from them. At this point, you may lose your inportant data and need Mac file Recovery tools to deal with such situationa.

In a practical scenario, when you try to mount a DMG file on the drive using Finder to access data from the file, you might come across below given error message:

"No mountable File System"

After this error message, the file become inaccessible along with all its data. In order to access data from the file, you need to find out the cause of this problem and perform File Recovery Mac operations by sorting it out.

A)    Mount-
           It is the process of making Personal Computer  file system ready to use. After mounting the drive or Disk Mounted Graphics file, it's contents can be accessed.

B)    Finder-         
           A Macintosh OS X application that manages user files, network volumes, disk, and launching of applications.

Cause
When you try to mount the Disk Mounted Graphics file, OS does not get file system in proper format for mounting the image. The file system is either damage or missing. Because of this reason, the Disk Mounted Graphics file may become unusable and you face severe data loss situations.

Resolution
Use Disk Utility  tool to check the integrity of the file. The tool checks the file for errors and if it detects any error,and then it try to fix the error. If Disk Utility fails to resolve the problem, perform Mac file Recovery using third-party applications