Tune4mac MP4 Converter is all-in-one software that can convert mp4 to aac on Mac OSX including Lion. Also, it is powerful application that can remove DRM from m4v video files purchases or rents on iTunes Store.

1. How to Extract AAC from MP4 Video Files
on Mac OSX
Is there any program that can extract the audio & video components of an mp4 file, like
mkv extract does with mkv? Similarly: is there any program that can encode, load
and/or play AAC audio files?
When you have the same problem as above mentioned, you should download the 3rd-
party application to complete this job, like Tune4mac MP4 Converter can act as MP4 to
AAC converter well. With this excellent tool, you could extract audio files like AAC, MP3
from MP4 video files, and batch conversion is its another useful feature.
Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding
scheme for digital audio. Designed to be the successor of the MP3 format, AAC generally
achieves better sound quality than MP3 at similar bit rates. A file with the AAC file
extension is an MPEG-2 Advanced Audio Coding file. Other types of files may also use
the AAC file extension. If you know of any additional file formats that use the AAC
extension
How to Extract AAC on Mac
To extract aac from mp4 on mac on Mac OX Lion, you should download professional
application to do so. Tune4mac MP4 Converter is the very software that you are looking
for. With it, not only can help you convert MP4 to the video format on Mac, also can
remove DRM from iTunes movies that purchases or rents in legal area. What's more,
the simple step-by-step operation could give you a great experience to convert MP4 to
AAC on Mac OS.
Tutorial
Download Tune4mac MP4 Converter and launch it;
- Click-one. Import MP4 video;
- Click-two. Choose "Customized AAC Audio (.aac)" as output format;
- Click-three. Click "Convert" button to convert MP4 file.

2. Tune4mac MP4 Converter is powerful application to convert video from one format to
another. When you purchases or rents a video with M4V format from iTunes Store, you
are not allowed to transfer it to any other Non-Apple portable media players, such as
Sony Walkman, PSP/PS3, iRiver, even mobile phones like popular Nokia, BlackBerry etc,
that because the DRM Copy-Protection is made by the movie producers for copyright
protection. So how to remove DRM from those iTunes movies? Probably, my article of
"Remove DRM from iTunes movie" would help you out.