> I have known several people who were otherwise pretty competent computer users but would download a DMG, mount it, and run the app from the disk image every t

> I have known several people who were otherwise pretty competent computer users but would download a DMG, mount it, and run the app from the disk image every time. Is there anything particularly wrong with doing this? I know that it's not the typical use scenario, but it doesn't seem like it causes any problems, and it's dead easy even for people for whom the correct procedure is hard.