It sounds weird, but for your question, Internet download manager IDM is the best download manager software for Mac OS X. There are two way to install and ran IDM on Mac.
- First way: Use virtualization software such as VMWare fusion 7, Mac Parallels Desktop 10 and Virtual Box to create a virtual machine with Window system installed. You will be able to run a Window system inside Mac OS, and of course, you can install IDM 6 in the Window – virtual machine. Look at this article Internet Download Manager IDM 6.23 Build 11 final full version free to download IDM 6 newest full free.
- The second way is using CrossOver pro to run and launch window softwares inside Mac OS. Look at How to install IDM Internet download manager on Mac