You may find good videos you like from websites and want to enjoy them on Mac, so you need to convert these videos (.FLV) to MOV formats played by Quicktime on mac. FLV to MOV Mac is your best choice. The professional conversion software can convert both DVD and videos to MOV format.
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Guide
Professional Mac FLV to MOV
Guide: how to convert flv to mov mac
One. Free download Mac FLV to MOV and install it in your mac.
Two. You can add flv videos into the program by clicking 
button. You can see these added files in Filename list. On the right pane a prescreen is provided to watch imported videos.
Three. Choose one added file and click 
button to edit the video. You can crop and trim the videos, adjust effects and add watermark.
Four. Output settings: choose output profile and folder.
Five. Then click "Convert" button to convert flv to mov mac. The conversion will show you the conversion progress:
OK, we have successfully finished converting flv to mov with FLV to MOV for Mac. Go to the defaulted folder and enjoy these videos with Quicktime player. Very easy, yeah.