new to mac, what to do with .dmg files?

Discussion in 'macOS' started by tman08, Mar 6, 2008.

  1. tman08 macrumors member

    Feb 26, 2008
    I've downloaded firefox and after installing it, i'm let with a .dmg file in the download stack. Last time I went ahead and deleted it but then firefox stopped working. What do I do with these .dmg files?
  2. TheStu macrumors 65816

    Aug 20, 2006
    Carlisle, PA

    Download the .DMB (short for Disk iMaGe) and let it mount. Then, within the DMG, drag the firefox icon from that Finder window to your applications folder. Then, eject the dmg.
  3. Quillz macrumors 65816


    Jan 6, 2006
    Los Angeles, CA
    Disk images are just archives that contain software. They are supposed to be deleted when you are done with them.
  4. Mashiach macrumors regular


    Mar 5, 2008
    In a House Near the Sea
    If you double click an application direct from a .dmg such as firefox that doesn't run through any installation set up (such as the install screen asking where to install it) then you are running it from the .dmg. Once you delete the .dmg you loose the ability to use the software (firefox in this case) as the destination path no longer exists for it. By dragging it to your apllications folder and then placing Firefox on your dock from the apllication folder (damn that was long winded) you are running firefox from the applications folder and not the .dmg. That way you can delete the .dmg and not worry.

    Step by step.
    1. Mount the .dmg
    2. Drag Firefox to applications folder.
    3. Unmount .dmg
    Go to applications folder and place Firefox on your dock by dragging to the dock from the app folder. (you don't have to do this if you don't want Firefox in your dock.
    4. Delete .dmg as it is unnessacary.

    One thing I always do is keep .dmg's like Firefox, messenger, azureus and other very common ones on a separate drive so when I come to reformat my computer I can just install them from the dmg's instead of searching the internet and re downloading the whole lot. But thats just me.

    Hope this helps.
  5. jaded-mandarin macrumors regular

    Jan 1, 2008
    Yeah open up your .dmg and it mounts. Then drag the application icon into your Applications folder. If you look at the mounted Firefox .dmg, you'll see it is showing you what to do in pictures.

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