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.
Download Intel Version 
Download PowerPC Version
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:
Download Intel Version Download PowerPC Version
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
