Solved: iMovie Keeps Crashing on MacOS (High Sierra Included)

Diana Joan

Aug 21, 2017 05:29 am / Posted by Diana Joan

Have you ever experienced iMovie crashed a couple of times that you can't complete any of your work? It's not just the obvious physical examples but are the problem, iMovie may crashes on its own when you try to import or edit video clips and that is something you really don’t want to ignore. Since more and more iMovie users complain the annoying issue that iMovie keeps crashing on MacOS, in this page, we'd like to list some reasons that caused iMovie crashing and share the easiest way to fix iMovie crash during importing and editing.

Why iMovie Keeps Crashing on MacOS (High Sierra Included)?

Actually, iMovie is an excellent video editor well-designed to allow users to import and edit video and photo files from a hard drive for Mac and iOS device(iPhone/Ipad/iPod). It is one of the most useful video editing tool that helps us customize our favorite videos. Since your iMovie keeps crashing on MacOS, here we go to dig deeper why iMovie keeps crashing. It can be summarized in several aspects:

1. iMovie project file got corrupted: Just trash the corrupted files and add the right ones. 

2. Errors in iMovie Cache folder: Try to trash and cache.plist; creating a new account and login; iMovie will create new error-free pref. and cache files. 

3. Preferences are wrong

If these solutions mentioned above are not working, you can try the diagnostic procedure below. Restart your computer, and open iMovie while holding down the option and command keys. Then continue to select the delete preferences option in the resulting dialogue box to delete preferences.

The other way is to update to the latest iMovie version: the recent version for iMovie is released to resolve quite a few of issues and the most prominent point is to repair iMovie crashes after MacOS update. Please upgrade your current iMovie version into the latest version to see if it can remove the crash bug.

4. File codec problem

Apple claims that iMovie supports most commonly-used video codecs, including DV, MPEG-2, MPEG-4, H.264, AVCHD and AIC. However, not all files are friendly when working in iMovie. We can easily fixed the first three issues by ourselves, if your iMovie still keeps crashing, the problems must be result from the incompatible codec, which means that the some of the video clips you have imported are not supported by iMovie.

Just convert video files to an iMovie compatiable format. Pavtube iMedia Converter for Mac makes it an easy job, enabling you to encode iMovie project to AIC(Apple Intermediate Codec), which features high performance and quality, being less processor intensive to work with than other editing formats.

The Best Alternative Solution to Fix All iMovie Crashing Problems

Pavtube iMedia Converter for Mac (Review) is not only a tool to solve file codec problem, but also the best iMovie alternative to achieves all basic video editing like what iMovie does, such as trim or cut video to remove the unwanted parts, crop video to get off the black bars around the video frame, add video/image/transparent text watermark to video, change video color effect such as brightness, contrast or saturation or apply some rendering effects, remove/replace audio in video, add external srt/ass/ssa subtitles to video, and more. To some degree, it solves all iMovie crashing problems originated from various reasons.

[How to] Solve iMovie Keeps Crashing Problem with Pavtube iMedia Converter for Mac

Before everything to fix iMovie keeps crashing error, you need free download the iMovie alternative on your Macbook, Macbook Pro/Air, iMac etc. first.

And if you're running on Windows PCs, Pavtube Video Converter Ultimate allows you to edit videos on PCs like what iMovie does on MacOS.

Step 1: Load iMovie project to the program

Click "Add Video" icon to import video files, or "Load Disc" icon to import Blu-ray or DVD disc to the program.

Load iMovie project videos

Step 2: Select output profile format

Click "Format" bar, from its drop-down option, choose one of iMovie supported file formats such as MPEG-4, DV, HDV, MPEG-2, AVCHD. You can also select to output "Apple Intermediate Codec(AIC)(*.mov)" to get a high performance and high quality editing workflow.

Select to output iMovie AIC format

Step 3: Customize video files

Click the Edit button on the main interface. And here we go to edit (trim, crop, add subtitle/watermark, rotate, subtitle etc.) your videos as you like:


You can also specify video/audio codecs, bitrates, frame rates, etc as you like by clicking Settings button.

Step 4: Begin the conversion process

After all the setting is completed, go back to the main interface, hit right-bottom "Convert" button to start converting your video files to iMovie supported formats or codec.

When the conversion is finished, click "Open Output Folder" icon on the main interface to pop out the folder with converted files, then all iMovie crashing problems will fall away.

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