Import AVCHD, MTS, M2TS, MXF files to Avid Media Composer for Editing.
Tutorial: 
Avid Media Composer is a type of computer software application known as a Non-linear editing system. Now Avid MC has upgraded to 5.5.3 for Mac OSX 10.7 Lion and allows for film editing, uncompressed standard definition (SD) video and high definition (HD) editing and finishing.
However, Avid Media Composer still can not support AVCHD, MTS, M2TS etc files from Canon, Sony, Panasonic, JVC, Sanyo etc HD camcorder. It now can natively accept MXF and MOV files.
MTS to Avid Media Composer converter allows you to convert Canon, JVC, Sony, Panasonic, Sanyo etc AVCHD, MTS, M2TS, TRP, TS files to MOV/HD MOV for importing to Avid Media Composer for editing. At the same time, the conversion can keep 1080p HD resolution and video origal quality.
PS: MTS to Avid MC Mac Version which also supports Mac Lion(10.5-10.7).
Get full version 
Download MTS Video Converter trial versionNow, Import and Convert MTS/M2TS files to Avid MC to MOV Step by Step:
Step 1. Add MTS videos
After MTS to Avid MC Converter, then just click "Add files"button to upload the MTS videos from your PC.
Step 2. Choose output format as MOV for Avid MC
Select HD Video > HD MOV Video (*.mov) as output format from Profile drop-down list. Then click the "Settings" button and choose 1920*1080 as output video size to keep HD quality.
Step 3. Convert MTS videos to Avid MC MOV on Mac
When all settings are done, you can click "Convert" button to convert MTS videos to H.264 mov for Avid Media Composer. After conversion, you can import the converted video into Avid MC for editing to make your own movies.
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