Can I used iMac's Image Capture app to import video from my camcorder to iMovie '09?
You would need the iMovie 10 installed on your iMac.

If you have a qualifying system and OS you get it for free, otherwise it is $15.

Be aware that you might have 2 iMovies apps in your Application folder. The older ver9 and the newer one v10. Look for it.

Apple shows it as supported (Canon VIXIA HF R600
Format: AVCHD / MPEG-4) in the iMovie 10 (but not in iMovie 9)