FastDMG

fastdmg icon

FastDMG is a free macOS utility to mount .dmg and other disk images quickly, without any unneeded nonsense. It is a very fast and reliable alternative to Apple's annoying DiskImageMounter.

Features

FastDMG is actually a minimal wrapper around the hdiutil command line tool that ships with macOS and therefore uses Apple's private DiskImages framework indirectly. It is free, open source software and has a home on GitHub. If you like it, feel free to make a donation.

Download

How to use

FastDMG will then take care of mounting .dmg disk images when they're opened in the Finder. You can do the same for .iso, .smi and any other disk images supported by FastDMG.