I'm the user of Canon 5D Mark III, great exprience until the moment when I transfer the Canon MOV footage into iMovie for further editing.
Searching high and low, a good suggestion is to use Brorosft Video Converter for Mac to solve the issue. This Mac video converter can be used as a Canon MOV to iMovie Converter in macOS Sierra, El Capitan, Yosemite, Mavericks, etc. With it, you can effortlessly transcode Canon H.264 MOV to AIC for iMovie, DNxHD for Avid, MPEG-2 for Premiere Pro, ProRes for FCP, etc., and it works well and converts flawlessly. Just download it below and follow the step-by-step guide to finish the Canon MOV to iMovie conversion with ease and start your home movie making.
Read More: Import Canon MOV to Adobe Premiere Pro
How to convert Canon MOV files for editing in iMovie
Step 1. Add Canon MOV footage to the MOV Converter
Once you run it, click Add button to load your source files. When the MOV files are loaded, you can view the videos from the Preview window.
Step 2. Select the output format
You can choose iMovie/FCE -> Apple InterMediate Codec(AIC) (*.mov) as the output format. The output format is designed for iMovie specially.
Tip: Furthermore, you are provided some useful edit functions cropping, trimming, adding watermark, attaching subtitles for pre-editing your video files so that you can simplify your iMovie editing.
Step 3. Convert Canon MOV to AIC
Click "Convert" button and the selected MOV files from Canon will be converted to AIC encoded MOV. You may check the converting progress and set auto shutdown in the conversion window. After conversion, click "Open" folder to find converted footage for importing to iMovie easily.