How to Open .DMG Files on Mac and Windows
Updated: February 2026
The .DMG file format (Apple Disk Image) is the standard software distribution format for macOS. DMG files are disk images containing applications, installers, or files for Mac computers.
Opening DMG Files on Mac
Double-click the DMG file to mount it. A new volume appears on your desktop or in Finder. Open it to access contents. To install apps, drag the application icon to your Applications folder, then eject the DMG.
Common DMG Installation Process
- Double-click the DMG file to mount
- Drag the app icon to Applications folder
- Eject the mounted DMG volume
- Launch the installed app from Applications
- Delete the original DMG file if desired
Opening DMG on Windows
- 7-Zip: Can extract DMG files to view contents (not run Mac apps)
- DMG Extractor: Free tool specifically for opening DMG files on Windows
- PeaZip: Alternative free archiver that handles DMG format
- TransMac: Reads Mac disk images and burns them to USB drives
Converting DMG Files
Mac's Disk Utility can convert DMG to ISO format or create DMG files from folders. This is useful for creating bootable installers or distributing software.
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Frequently Asked Questions about How to Open .DMG Files on Mac and Windows
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