How To Prevent Opening Dmg Files

Every time I open Firefox I get prompted to open a.dmg file and instead of opening the Start Page it goes to Firefox Downloads. How do I stop this?
Right click DMG File Click Get Info (View the original size). Open Disk Utility Select Images TabClick on ResizeSelect the DMG file to be resized. Click on Open Type the file size to be reducedSelect ResizeDone.

Windows cannot open this file: example.dmg To open this file, Windows needs to know what program you want to use to open it. If you don't know how to set the.dmg file association, check the FAQ. Can I change the extension of files? Changing the filename extension of a file is not a good idea. Open up Disk Utility and choose File New Image Image from Folder (or blank image if you want to make an empty DMG file you can add stuff to later). In the window that pops up, select the folder you want to encrypt and click the “Choose” button.

2 file types use the .omg file extension.

1.Image File
2.OpenMG Audio File

File Type 1Image File

Developer	O&O Software
Popularity
Category	Disk Image Files
Format	N/A

What is an OMG file?

Disk image created by O&O DiskImage, a Disk image creation and file backup application; contains a perfect copy of the original disk image; the disk image copy includes all the sectors of the drive and creates an image of the file system with all the files and folders; similar to .ISO, .BIN, and .DMG disk image files.

To create the OMG file:

Select the 'Start drive imaging' option on the main Start page or select Start → Drive image from the menu.
Check the box next to the source drive you'd like to create the image from and select .
A 'Drive Imaging' window will open with the 'Target' directory highlighted and other imaging options. Once you tailor the options to your liking, click . When the process is completed, click .

To restore an image using the OMG file:

Select the 'Start restoration' option on the main Start page or select Start → Drive restoration from the menu.
Navigate to the OMG file you'd like to restore and click .
Check the box next to the source drive you'd like to restore the drive from under 'Source drive,' then check the box next to the drive you want to restore to under 'Target drive,' and select .
A 'Drive restoration' window will open with the 'Target' directory highlighted and other restoration options. Once you tailor the options to your liking, click . When the process is completed, click .

To convert the OMG file to a .VHD file:

Select Tools → Convert image file... from the menu.
Select 'Image files (OMG)' under 'Source,' click , navigate to your OMG file, select , check the box next to your contained volume, and then click .
Select 'Virtual hard disk (VHD)' under 'Target,' customize any options you want (note the Target path where your VHD file will be created), and click .
Once the process is complete, click .

NOTE: You can convert a VHD file to OMG by reversing the 'Source' and 'Target' file selections.

Image20131215.omg - Name of an OMG file that was created on December 15th, 2013. O&O DIskImage creates files by listing the type (Image) and then the date it was created.

Conversion20131217.omg - Name of an OMG file that was created on December 17th, 2013. O&O DIskImage creates files by listing the type (Conversion) and then the date it was created.

Open over 300 file formats with File Viewer Plus.