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Internet Download Manager (IDM) allows increasing download speed significantly, resuming and scheduling downloads. Interrupted downloads are not a problem with IDM Mac apps. Simple and understandable user interface makes IDM a must-have for everyone.
When you switch from Windows to Mac OS you can discover that ToneC haven't released their app for Mac, so you'll need to find a quality IDM for Mac OS X alternative. A great alternative for IDM Mac OS X would be Folx - a free Internet download manager for Mac.