iMovie Problems since macOS Sierra upgrade

One advice (maybe known for you): Check your iMovie Projects and iMovie Events forlders before updates. If there are files UpdatedToiMovie10, delete them. Otherwise iMovie 10 consider that everything is taken over from v9 and states iMovie could not find any projects or events to update. If the fileUpdatedToiMovie10 is missing, iMovie 10 takes over all Projects and Events fromiMovie ProjectsandiMovie Eventsfolders.

By deleting mentioned files you can to move project from v9 to v10 as many times as you need. If you want, you can develope your projects in v9 and render from v10.

I understand that migration to new versions are sometimes painful, but we cannot run old versions forever.

Well Jan,

you helped a lot... actually i killed those files, and i was able to import the old events and project files into v10. Seemed fine, but stabilisation option not owrks in v10 or what? it just freezed the software any time i tried to ad some stabilization for the squeze clips. Anyway I always wanted to move on to Final Cut Pro, so why not now? When the Earth is tremble 🙂 So, I checked it and it is possible to move forward the whole event and project to FCP, that is much better software than imovie... Now I have to find some tutorials to learn really really fast to operate my projects 🙂

So, your comment was useful, it made me looking around to find some solutions and not giving up!

Thx!

Bonsoir,

I have the same problem: iMovie doesn't allow anymore to import videos from my caméscope JVC GR-D270 (cassette miniDV). This caméscope is no more accepted by iMovie (10.1.3).

This problem existed also with Mac OS El capitan.

Who can help me to come back to older OS for my iMac (Apple perhaps?)

Michel Guiheneuf

Check out LYNDA.com, can pay by the month too. I learned a lot about Photoshop and Creating Wordpress websites on it.

I have the same problem with the green screen. I updated to Sierra and IMovie updated itself to 10.1.4. I have never had this problem with any versions before. I have tried just about everything except reinstall an older operating system. I opened an older (9.0) version of Imovie and still had the random green screens. I emptied libraries (suggested by another user). I totally started over and made my movie again. I exported in different settings, etc. Nothing has helped. My movie was totally made of old photographs and was intended to be a Christmas gift, but is not fit to give because of the random green screens instead of some of the photos. I don't know the fix but wondering if it is the Sierra because I have tried about everything else.

How about downgrading the system to your previous version becuase my imovie stopped while using os sierra and i was on El Captain

Ok Select all in Edit then back ! like clicking the ! Inspector and going to clips and then video effects and filter tap on hard light works . Thanks for the information.

Same problem! (That's why I avoided upgrading for as long as possible!)
bdstrom: did you ever get the problem resolved?

iMovie 9.0.9 is not compatible with Sierra. The only solution I have found is to upgrade to version 10. My movies look great again.