There are many alternatives to JDownloader for Mac if you are looking for a replacement. The best Mac alternative is DownThemAll, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to JDownloader and many of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to JDownloader are Free Download Manager (Free), Xtreme Download Manager (Free, Open Source), 4k Video Downloader (Freemium) and FreeRapid Downloader (Free, Open Source).
Lightweight Download Manager with great features like Browser Integration, Pause & Resume and Leechs rules. Leechs rules let you define individual download folders and postprocessing applications for any given file type/host combination.
Download Shuttle is a blisteringly fast download manager and accelerator for Mac. It allows you to download multiple files at a faster speed that your web browser & has support for password protected files.