Recently, Apple started supplying some software in a new form. Although you download an apparently normal .dmg file, clicking on it doesn’t mount the disk image as usual – instead, files from the image are copied to the download folder, the image is dismounted and moved to the trash.

At first I thought this unwelcome, overly helpful, and even disquieting – are they executing a script and can this be used as a vehicle for virii and trojans?

However, Apple just published a note about how these files work, and how to create them yourself. No scripts are involved, so that’s one worry less.