Is there a download manager for MACs? If so, where do I find the download?
Yes, there are actually plenty of download managers available for Mac OS X. I can recommend you the one that I have been using for some time. It's free and provides basic and advanced features regarding the download manipulation.
You can download it through the MacApp Store or using the following link: https://itunes.apple.com/us/app/download-buddy/id802165887?mt=12