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dmg autorunning? - Mac Applications & Software

hi! i am using OSX and things i download come on "dmg"s, which i've figured are some kind of soft-partition disk images. they mount when you double-click them. but some seem to be able to go on and do other things, like "autorun" in Windows. is this dangerous? can it be stopped by some switch i am overlooking? also one dmg seemed to have a largish picture in its window. i thought it might be a trick like from the old days, lots of folder icons patched together to give the appearance of a large image, but nope, it seems ...

  1. #1

    Default dmg autorunning?

    hi!

    i am using OSX and things i download come on "dmg"s, which i've figured
    are some kind of soft-partition disk images.

    they mount when you double-click them. but some seem to be able to go on
    and do other things, like "autorun" in Windows.

    is this dangerous? can it be stopped by some switch i am overlooking?

    also one dmg seemed to have a largish picture in its window. i thought
    it might be a trick like from the old days, lots of folder icons patched
    together to give the appearance of a large image, but nope, it seems to
    be a real picture.

    what are the powers and capabilities of dmg files and where can i learn
    more about them on my way to learning to stop worrying and love them?

    -- rob

    Robert Guest

  2. #2

    Default Re: dmg autorunning?

    In article <Gm47b.7631$gnilink.net>,
    Robert A Moeser <net> wrote:
     

    Could you be more specific about what they're doing? They should be
    able to pop up a license file and ask you to agree to it. Some are
    "internet enabled" and will automatically unpack their contents, and
    then move themselves to the trash. But as far as I know that's it.
     

    On Mac OS X, any Finder window can have a background image. It's no
    different on disk images than it is anywhere else.
     

    Depends on how geeky you want to be. I used things like "man hdiutil"
    and O'Reilly's "Mac OS X for Unix Geeks" book. It was effective but
    maybe more technical than you'd like.

    --
    Tom "Tom" Harrington
    Macaroni, Automated System Maintenance for Mac OS X.
    Version 1.4: Best cleanup yet, gets files other tools miss.
    See http://www.atomicbird.com/
    Tom Guest

  3. #3

    Default Re: dmg autorunning?

    Tom Harrington wrote: 
    >
    >
    > Could you be more specific about what they're doing? They should be
    > able to pop up a license file and ask you to agree to it. Some are
    > "internet enabled" and will automatically unpack their contents, and
    > then move themselves to the trash. But as far as I know that's it.
    >

    >
    >
    > On Mac OS X, any Finder window can have a background image. It's no
    > different on disk images than it is anywhere else.
    >

    >
    >
    > Depends on how geeky you want to be. I used things like "man hdiutil"
    > and O'Reilly's "Mac OS X for Unix Geeks" book. It was effective but
    > maybe more technical than you'd like.
    >[/ref]

    thank you. your answer accounts for all behaviours observed so far. in
    particular it seems that it is not possible to automatically run an
    arbitrary piece of software, which seems like a good thing.

    i am curious about the construction of these more-capable disk images. i
    have access to the O'Reilly book, this seems like a good enough reason
    to crack it open.

    -- rob

    Robert Guest

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