Wondershare YouTube Downloader for Mac, is a very easy to use Youtube video download tool and YouTube Converter for Mac OS User. It has the complete functions to download YouTube video, archive Youtube video, and convert Flash video(FLV) to iPod,iPhone, PSP, Apple TV, Zune, Pocket PC and a lot of other mobile devices on Mac OS.

As a Free Mac YouTube Downloader, it can automatically detect the YouTube video files from the YouTube web pages you have opened and download multiple files at a time. YouTube downloader for Mac is a totally free YouTube video downloader for Mac, because if you don’t want to convert downloaded videos to your mobile players, you don’t have to pay for it.

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Step1: Intall Youtube Converter for Mac and the interface is like this:

Step2: Open www.youtube .com and choose the files you like and the program will detect the URL and automatically start downloading a video when it starts to play.From the source list, you can find the status of each file.

Click “souce” folder to find downloaded files.

Step3: Start converting by click "convert" button.

As your downloaded youtube vidoe is flv video, if you want to extract music from flv video to mp3, and then sync it to your iPod or put on CD.  U can use Mac FLV Converter to convert flv video to MP3,

Step 1: Free download FLV to MP3 Converter for Mac, and install on to your Mac:

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Step 2: Click the Add Files button, to select FLV videos you want to convert to MP3

Step 3: In the Format: option, click the up and down arrow, choose the MP3 format or other audio formats, the formats like below:

Step 4: Under the Output: option, Click the”Browse” button to select the destination folder you want your FLV videos to be stored:

Step 5: At last, click the button, FLV to MP3 Converter for Macshall start to work automatically.

After successful converted FLV to MP3 for Mac, the interface will like below. The converted FLV Video shall be stored in the folder you have previously selected.

Ok, we have finished the whole process of converting Flv to MP3 for Mac OS X