Apple - Download Manager for Mac OS X

There are several choices :

  • Folx :

Folx is a free download manager for Mac OS X with a true Mac-style interface. It offers convenient downloads managing, flexible settings, etc. Folx has a unique system of sorting and keeping the downloaded content.

Folx Screenshot

  • iGetter:

iGetter is a full featured download manager and accelerator. With iGetter you can get the most out of your Internet connection be it dial-up, wireless, cable, DSL, T1 and other high end broadband connections. iGetter can greatly improve the speed of your downloads using segmented (accelerated) downloading.

iGetter Screemshot

  • Leech (paid one) : clean UI.

Every modern browser has its own download functionality, so why should you use a separate application for handling downloads in the first place? Because Leech works better than any built-in download manager.

Leech

  • jDownloader 2

JDownloader is a free, open-source download management tool with a huge community of developers that makes downloading as easy and fast as it should be. Users can start, stop or pause downloads, set bandwith limitations, auto-extract archives and much more. It's an easy-to-extend framework that can save hours of your valuable time every day!

jDownloader - Fat Pipe: (free)

Most servers and internet service providers limit the speed a single connection can have. We can bypass these limits by splitting a download task up into many smaller chunks. This guarantees that you will fully saturate your internet connection.

http://fatpipeapp.com/media/demo.mp4


I highly recommended you use iGetter it was better than other one.

  • iGetter

but also can use

  • Download Accelerator Plus (DAP)
  • Folx (free) but can pay money and upgrade it to pro

Also if you can use terminal and install package I recommended you use AXEL I myself use this one. after install it you can use this like below in terminal

axel -n 100 -s 5242880 "your download link"

the -n 100 show the number of your connection to the server

and the -s 5242880 use for limiting the speed,-s 5242880 in above example will try to keep the average speed around 5242880 (5120 Kilobyte per/sec).


Aria2 bundled with WebUI is the best you can get on OS X. All you have to do is run Aria from Terminal and open WebUI in Browser.

Features

  • Multi-Connection Download. aria2 can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth. Really speeds up your download experience.

  • Lightweight. aria2 doesn’t require much memory and CPU time. When disk cache is off, the physical memory usage is typically 4MiB (normal HTTP/FTP downloads) to 9MiB (BitTorrent downloads). CPU usage in BitTorrent with download speed of 2.8MiB/sec is around 6%.

  • Fully Featured BitTorrent Client. All features you want in BitTorrent client are available: DHT, PEX, Encryption, Magnet URI, Web-Seeding, Selective Downloads, Local Peer Discovery and UDP tracker.

  • Metalink Enabled. aria2 supports The Metalink Download Description Format (aka Metalink v4), Metalink version 3 and Metalink/HTTP. Metalink offers the file verification, HTTP/FTP/BitTorrent integration and the various configurations for language, location, OS, etc.

  • Remote Control. aria2 supports RPC interface to control the aria2 process. The supported interfaces are JSON-RPC (over HTTP and WebSocket) and XML-RPC.