How to Open Disk Image (DMG) Files That Are Not Allowed on a Mac

If you've got a disk image file (.dmg) that you want to open but can't because you're not an admin, this workaround can help.

Steps

1
Download the file.
2
After it's finish, go to Disk Utility.
3
Open the .dmg file with the Disk Utility still open. You will see the .dmg file on the left of the Disk Utility screen.
4
Click the .dmg file (Not the USB as some files have). Click "convert" on the upper part of Disk Utility. In newer versions of IOS it will be located in the "Images" menu, located at the top left bar on your desktop.
5
Rename it to something else to tell the difference between the old and new .dmg file. Example: helloworld becomes workinghelloworld.
6
Wait for the transfer.
7
Open the file. After it's finished, you should be able to open the contents in the .dmg file.