How to Mount an MDF on a Mac

By Alexander Poirier

Disk Utility is the default image mounting application for Mac computers.
i Brian Kersey/Getty Images News/Getty Images

The MDF file format is the proprietary format for the Alcohol 120% application. If you are a Mac user, there is no native way to mount an MDF file, and no way to install the Alcohol 120% application. Since MDF and ISO files are similar, changing an MDF file extension to ISO allows a Mac computer to mount the file with the Disk Utility application.

Press and hold the Ctrl key and click on the MDF file. Select the "Get Info" option from the menu that appears.

Click the arrow to the left of the Name & Extension heading. Delete the "mdf" file extension at the end of the file name and type "iso" in its place. Click the "X" icon in the upper left corner of the Get Info window to close the window and save the changes.

Double-click the renamed MDF file to mount the file with the Disk Utility application. Since the file was renamed with the ISO file extension, Disk Utility will mount the file as if it were an ISO file.