The GZ-MG330 has been tested with iMovie 09 (See links below) and just needs to be connected to the Mac with the USB cable. Switch the camera on and select it's Playback on PC setting. Launch iMovie and import the video for editing and sharing.
Connect the Everio to the Mac with the USB cable. Switch the camera on and launch iMovie on the Mac. The camera should be recognised by iMovie and the video imported.