Right, I think there is an acceptable solution for an IDM replacement for the MAC in regards to having a
download manager (dm) + accelerator that can easily grab not only images, etc but most importantly media files (video, audio).
I've found using a combination of the following two apps works best for me but if you just need to grab media files,
just getting the first app is sufficient but lacks slightly in download speeds:
1.
FlashGot / firefox dm integration extension (
https://addons.mozilla.org/en-US/firefox/addon/220/ )
2.
jDownloader / download manager+accelerator (
http://jdownloader.org/download/index )
The concept is basically that you use FlashGot to grab the media files by performing a secondary tap on the page you want
which will bring up a menu indicating the option to start downloading. FlashGot itself uses the FireFox built-in dm but you have
the option to use a dm which has an accelerator to boost d/l speeds. You can see a list of supported dm that works with
FlashGot at
http://flashgot.net/features .
This is by no means as snappy as having a download button on top of the video/audio elements like IDM but hey it works.
I'm happy