.MTS files reside within a specific folder structure that is often required for the file to be used. This highly structured system of folders tells the appropriate software on the computer exactly what the file contains and how to best utilize it. Fortunately, most video editing and viewing software allows the user to bypass this complex folder structure by importing the .MTS file directly into the program. When attempting to copy .MTS files directly to the desktop, though, it is important to retain the folder structure in which they are contained.
Users can record their own footage, import other footage from outside iMovie, or bring pictures in for a still movie. Once there is footage to manipulate, users can add transitions, edit the clips, add effects, and tie music or voiceover to the footage.
Imovie is a great tool to organize,edit and share clips from camcorders and videos on your Mac. However you can't import mts files to imovie directly. The main reason is that imovie can't recognized the mts files. But how to edit MTS files with iMovie on Mac is still a trouble for many Mac users.
In order to import mts to imovie successfully, The first step what you should do is convert mts to the format which imovie support.
video Converter for Mac is designed for you to convert M2TS, MTS files to iMovie MP4, and allow you to transfer AVCHD M2TS, MTS to MOV mac, M4V, AVI, MPEG-4, 3GP, FLV etc. Then you can import MTS to iMovie on Mac OS for editing.
Besides,Sony Cyber-shot camera shoots HD AVCHD (Advanced Video Coding High Definition, a format using the MPEG-4 AVC/H.264 standard, with file extensions like M2TS, M2T, MTS, TS, TR, TP, TRP, TOD, MOD etc.) files, and many Mac users will experience many difficulties with Cyber-shot AVCHD files on Mac, because Sony Cyber-Shot video in the .mts format which is not supported/recognized by mac iPhoto/iMovie/QuickTime. So you just need to convert Sony Cybershot to Mac supported .mov format. With sony cybershot software mac, you can easily convert and edit AVCHD footage on Mac OS, that is to say, you can convert Cyber-shot AVCHD files to any popular video format, such as MOV, MP4, AVI, WMV, M4V, 3GP, SWF, FLV, MKV, etc.