FastDMG is a macOS utility to quickly and efficiently mount
.dmg and other disk images without any unneeded nonsense. It is a very fast and reliable replacement for Apple's hopelessly inefficient and annoying DiskImageMounter app.
- ⇩ Download FastDMG 1.0 (~1.2 MB, Intel 64-bit, 10.8 or later)
- Doesn't waste your precious time verifying disk images
- Auto-accepts annoying end user license agreements
- Runs in the background (doesn't show up in the Dock)
- Displays no windows or menus and stays out of your way
- Multithreaded and can concurrently mount several images
- Disk image document icons continue to look the same
- Handles all disk image types supported by DiskImageMounter (dmg, iso, smi, etc.)
FastDMG is a very minimal wrapper around the
hdiutil command line tool that ships with macOS. It therefore uses Apple's private DiskImages framework indirectly. It is free, open source software. If you like it, feel free to make a donation.
How to use
- Move FastDMG.app to your Applications folder
- Select a
.dmgfile and press Cmd-I to show the Finder's Get Info window
- Select FastDMG under "Open with:"
- Press "Change All..."
FastDMG will then take care of mounting
.dmg disk images when you open them in the Finder. You can do the same for
.smi and any other disk image formats supported by FastDMG.
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