If you are like me, you download random apps, play with them for about 20 minutes, and then forget about them.  But what people may not know is that when you download a application, a DMG comes with it (Disk Image).  And when you have tons of apps on your computer, you have tons of DMG's, which takes up a very large amount of space. The thing is that apps do not always need a DMG to run, so if you remove your DMG's off your computer, it wont effect the apps and you will free up tons of space on your computer. Now don't just go and delete all your DMG's off your computer right now, you need a external hard drive so you can still keep them, but off your computer.

What you will need for this is:

External Hard Drive- I suggest larger than 250GB but its up to you, I have a 640 I believe

You can buy one off apple.ca if you want to be ripped off.... but I suggest you go to tigerdirect.com or be like me and hit up Costco!

Now for the actual process!

1. First you want to open a Finder window and type .dmg into the search bar.  (Make sure to include the . )

2.Create a file on your desktop called DMG's or what ever your heart desires

3.Then you want to highlight all the DMG's you can see, if there is random files that are not DMG's you can hold down Command and then select them.

4. Drag all your DMG's to your new file on your desktop

5. Open your hard drive from your desktop or finder and make sure Time Machine is off, we do not want to back up

6. Once all of the DMG's are moved, disconnect your hard drive and repeat step 3, once you have done that, press command delete and then shift command delete -( Move to trash and empty trash)

You will notice that you will have a lot of extra space after you delete, to check how much space you have open a finder window and look at the bottom, it will show it there. The first time I did this I think it took off about 15 GB off my hard drive..... thats A LOT!

More great tutorials like this will be coming soon!