Step 1: Free download the MTS Converter for Mac (Intel Version PowerPC Version) and launch it.
Step 2: Launch the MTS Converter for Mac and the interface is as follows:

Step 3: Click "Order Later" button start MTS Converter for Mac in the Demo if you try out M2TS Converter for Mac first.

Step 4: Click "Add Files" button to input AVCHD MTS video files from HD camera/camcorders file(s):

Step 5: Select MTS output MPEG2 or AVI or WMV or MP4 or QuicTime format from the Profile box.
After you added MTS files, you can select an output format for each video file and specify a directory on your computer to save the output files.
MTS Converter supports comprehensive video formats including AVI, MPEG, WMV, MP4, MOV, XviD, 3GP, FLV, etc.

Step 6: Edit and Trim MTS files and Apply various video effects to MTS videos.
1. Capture a clip from your video file
Click the Trim button to open the Trim window and trim the current video file by dragging the Start Time slider to set the start time and dragging the End Time slider to set the finish time.
2. Crop Movie Video
If you want to remove the black edges or just convert part of the video area from your video file, you can click the Crop button to crop the video of the current video file by dragging the frame around the video.
3. Video Effect
Click the Effect button and drag each effect adjustment slider to set the video brightness, contrast, saturation and audio volume. You can also choose to flip the video and apply a special video effect to your video file by selecting a special effect from: Gray, Emboss, Old Film and Negative.

Step 7: Click "Convert" button to start the AVCHD MTS Video files conversion job.

Step 8: Go to the output directly to find the converted AVCHD MTS video files in MPEG2, AVI, QuicKTime, MOV, MP4 or WMV format.

OK. we have finished convert AVCHD MTS video files to MPEG2.
With the tutorial above, I believe you can easily convert almost all HD video formats like MTS, TS, TP, TRP high defination video files easily. Just free download (Intel Version PowerPC Version) and enjoy it.
For MTS Converter Windows Version, try demo here.