To convert VOB to AVI for Mac, you are highly recommended a professional app, DVD Ripper for Mac (if the VOB files are still in your DVD discs), to be your assistant. The VOB to AVI Mac app is specially designed for converting video and audio files. By years of developing and upgrades, the amazing application enables you to do the conversion as quickly and easily as possible.
Note:By the way, if you have some digital VOB files stored on your Mac rather than VOB files in DVDs, you need another Mac app: Video converter for Mac. This Mac app also can easily and quickly convert VOB to AVI without losing video quality.
Step 1. Import VOB files to the program
Drag & drop DVD disc icon 
on the desktop to the VOB to AVI Mac app. Or go to the “File” menu, choose “Load DVD” to locate the VIDEO_TS folder that contains all VOB files.
Step 2. Select AVI as the output format
Open the format list then choose AVI under the Video Formats section. If you want to import the output files to portable devices, such as PSP, Xbox, Nokia, BlackBerry, even iOS devices like iPod, iPhone, iPad, Apple TV for playback, you then are offered some predefined settings for those popular devices, which means, you can choose the corresponding device as the output format.
Note: The VOB to AVI Mac ripper additionally provides some edit functions to mix the video with your own flavor. You can split the special part of video clips, apply cool effects to the video or take your favorite scene as photo…detailed info in the user guide of DVD ripper for Mac.
Step 3. Start to convert VOB to AVI on Mac
Hit the “Convert” button to start video conversion on Mac. Uncheck the preview window can speed up the conversion on Mac. If you don’t want to wait around during the conversion, you can let this smart DVD Ripper for Mac automatically switch off the computer when the conversion is done.
