imovie crashing 4k

Crashing can be caused by a number of things. Just need to try some diagnostics.

iMovie does not support 2.7k or 4k 60fps. That might be the problem. iMovie does support 4k 30 fps and 1080 60 fps.

Or, there might be a corrupt preference causing the crash with your 4k movie. That can happen. Try deleting preferences. Opening iMovie while holding down the Option and Command keys and select to delete preferences in the box that

appears. iMovie will open in a new library. Reopen your old library to get back to your projects. Now see if you can share out without crashing.

Another possibility is that there is corruption confined to that one project. Try creating a new project and put your 4k clip into it as the first clip added. Then see if you can share out. If still no luck, it might be a clip that is corrupt, in which case expand out your timeline and slowly scroll through it, looking for white flashes, black frames, artifacts or any other signs of corruption. Cut out any that you find and try again to share out.

In case it is a library issue, try opening iMovie in a new library and creating your project in the new library. Hold down the Option key while opening iMovie and select to create a new library from the box that appears. Try to share out your project from there.

There are other things that can be tried as well, such as opening in Safe Mode and immediately shutting down after everything loads, or opening iMovie in a new user account.

-- Rich

4k at 25fps should work O.K.

You could try lowering the bitrate from the custom settings and see if that makes any difference.

Also, try booting up in Safe Mode (see Finder menu for instructions) and, after everything loads, immediately shut down and reboot in normal mode. Sometimes that clears out conflicts that cause crashing problems.

-- Rich

To cover the bases, here's a link that describes how to use Safe Mode:

https://support.apple.com/en-us/HT201262

-- Rich

Yes, it never hurts to delete preferences. So try that procedure again.

Also, try resetting the system management controller as I mentioned in an earlier post.

You have a conflict somewhere on your Mac. Here are a couple of other things to try:

Try opening iMovie in a new user account, either one you create or by using the Guest account on your Mac. See if iMovie works properly there.

Try doing a First Aid scan from the Disk Utility app on your Mac.

All else failing, try redownloading iMovie from the online app store. To do that, move your current iMovie app from the Applications folder to the trash, but do not empty the trash. Then go to the app store, sign in, and navigate to

your Purchases folder and redownload iMovie. If for some reason you can't get a new download, move your old iMovie app from the trash to the Applications folder.

Hopefully you can isolate the conflict with one of the above.

If nothing works, then you might consider calling Apple Support and talking to one of the savvy techs there. They have the capability of remotely accessing your computer. Click on the Contact Support item in the upper right hand corner of this screen. Navigate to a place where you can input your telephone number.

Good luck with this.

-- Rich

Here's a couple of other things that you can try:

Resetting the System Management

Controller

Try resetting the System Management Controller:

https://support.apple.com/en-us/HT201295

Resetting the NVRAM

or PRAM

Try resetting the NVRAM or PRAM, although this issue would be fairly rare:

https://support.apple.com/en-us/HT204063

-- Rich

Great! Let’s hope.

— Rich

You are welcome. Thanks for posting back.

-- Rich