A comment on an old StackOverflow answer of mine took me to task for a “partial answer” so I decided to improve it. Both posters wanted to know if a mounted device is a disk image. I wrote a simple routine using the DiskArbitration framework to test this given a file URL.

The Code



BOOL isDMG = [someObject isDMGVolumeAtURL:[NSURL fileURLWithPath:@"/Volumes/Some Volume"]];

In the above someObject refers to whatever object you put this method in, of course. It should probably be a category on NSURL (so you could ask the url directly: BOOL isDMG = [volumeMountPointURL isDMG];). I hope you find it useful!

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