Wondershare Free YouTube Downloader for Mac is a free application that searches, downloads and organizes YouTube videos on your Mac. It satisfies all your need to manage and enjoy YouTube videos.
You can get the software from the below link
Click Here To Download Wondershare Free YouTube Downloader for Mac
Supported OS Mac OS X 10.5 or above operation system (including 10.6 Snow Leopard)
Processor 1 GHz or above
RAM 512MB of RAM or above
It lets you download YouTube videos in batch with good speed and stability. It shows all the downloading progress to help you manage time better. A great built-in Player could play both downloaded YouTube and existing FLV videos with high quality. If you are using Windows then you can get the software for the same here.