As part of the transition to 64-bit technology in macOS, you may see an alert in iMovie about media files that won't be compatible with macOS Catalina.

IMovie High Sierra download Download iMovie for Mac - Free - 10. IMovie is the native video editor from Apple for Mac devices. If you've ever wanted to start video editing with a simple program, this one will be a good choice. Hot on the heels of Apple releasing macOS High Sierra to the public earlier today, the company has updated iMovie with several enhancements. The update brings the video editing app to version 10.1.

Before you upgrade to macOS Catalina, you can use iMovie to detect and convert all incompatible media files so they'll be compatible with future versions of macOS. After you upgrade to macOS Catalina, the option to convert the incompatible files will no longer be available.

To make sure new media you create is compatible with macOS Catalina, use cameras and media formats supported by iMovie.

In macOS Catalina, you might see an incompatible media message in the viewer when trying to play incompatible media if you haven't converted it before upgrading to macOS Catalina.

Detect and convert incompatible media files in iMovie on macOS Mojave

When you import media or open a library in iMovie 10.1.11 or later on a Mac with macOS Mojave, a window appears that lists incompatible media files in your library.

To convert incompatible media files immediately, click Convert in the window. iMovie creates copies of the media files in the H.264 format. The original files are moved to an iMovie Incompatible Media folder, located in the same folder as the library. Your original media is not modified.

If you want to convert them later, you can use iMovie to scan the library and convert the incompatible files:

1. In iMovie choose File > Check Media for Compatibility.
2. In the window listing incompatible media files, click Convert.

Learn more about how iMovie detects and converts incompatible media files.

Formats compatible with macOS Catalina

These video, audio, still-image, and container formats are compatible with iMovie on Mac computers with macOS Catalina:

Video formats

• Apple Animation Codec
• Apple Intermediate Codec
• Apple ProRes
• AVCHD (including AVCCAM, AVCHD Lite, and NXCAM)
• DV (including DVCAM, DVCPRO, and DVCPRO50)
• H.264
• HDV
• HEVC
• iFrame
• Motion JPEG (OpenDML only)
• MPEG-4 SP
• Photo JPEG
• XAVC-S

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Media formats affected by the transition to 64-bit technology

Examples of media that will be affected by the transition to 64-bit technology include video files from early Flip Video cameras that use the 3ivx codec, early web videos encoded with the Sorenson codec, and media converted from DVD to the DivX format.

Third-party developers may continue to offer compatibility with some formats by building support directly into their apps. Contact developers of third-party apps for more information about media formats supported in their apps.

Here are some examples of media formats affected by this transition:

• 3ivx MPEG-4
• AV1 / VP9
• AVC0 Media AVA0 Media
• BitJazz SheerVideo
• CineForm
• Cinepak
• DivX
• Flash Video
• FlashPix
• FLC
• H.261
• Implode
• Indeo video 5.1
• Intel Video 4:3
• JPEG 2000
• Microsoft Video 1

• Motion JPEG A
• Motion JPEG B
• On2 VP3, VP5, VP6, VP6-E, VP6-S, VP7, VP8, VP9
• Perian collection of codecs (Microsoft MPEG-4, DivX, 3ivx, VP6, VP3, and others)
• Pixlet
• Planar RGB
• QuickTime files encoded using still image formats (SGI, TGA, PNG, and others)
• RealVideo
• Sorenson 3
• Sorenson Sparc
• Sorenson Video / Video 3 / YUV9
• Streambox ACT-L2
• Windows Media Video 7, 8, 9
• Xiph.org’s Theora Video
• ZyGoVideo

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Convert incompatible media not contained in an iMovie library

To convert an incompatible media file, open it with QuickTime Player (version 10.0 and later) in macOS Mojave or earlier, then save a copy with a new name. This method isn't supported in macOS Catalina.

You can also use Compressor to transcode one or more media files into a format such as H.264, HEVC, or Apple ProRes. These formats will be supported in versions of macOS after macOS Mojave. H.264 and HEVC preserve image quality with the smallest file size. ProRes preserves the best image quality and provides better performance when editing in iMovie, but creates much larger files that use more storage space than H.264 and HEVC files use.

Turn your videos into movie magic.

With iMovie for iOS and macOS, you can enjoy your videos like never before. It’s easy to browse your clips and create Hollywood-style trailers and stunning 4K-resolution movies. You can even start editing on iPhone or iPad, then finish on your Mac.

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Make Movies

Easy. From the first
scene to the last.

Whether you’re using a Mac or an iOS device, it’s never been easier to make it in the movies. Just choose your clips, then add titles, music and effects. iMovie even supports 4K video for stunning cinema-quality films. And that, ladies and gentlemen, is a wrap.

Edit Like a Pro

With iMovie, create professional-looking videos without an editing degree. Easily add photos and videos to projects, trim clips with your finger, add seamless transitions and fade audio like a pro.

High-Fidelity Filters

Choose from 13 creative video filters that add a cinematic touch. Give your film a nostalgic silent‑era style, a vintage western appearance or a fun comic book look. It’s simple to apply filters to individual clips or your entire movie, and adjust the intensity on your iPhone or iPad.

Extra-Special Effects

Make action shots more exciting by slowing them down. Let viewers fly through scenes by speeding them up. Or add a broadcast feel to your school report with picture-in-picture and split-screen effects.

Soundtracks, Simplified

Rock your video with over 80 smart soundtracks on iOS that intelligently adjust to match the length of your movie. You can also add built-in sound effects or record your own voiceover to create a video that sounds as good as it looks.

Whether you’re making a silent film, moving a story forward or simply have something to say, iMovie titles and backgrounds let you quickly create personalised title cards, credits and more on your iPhone and iPad. Easily customise titles by choosing your favourite fonts and colours, pinching to scale, placing them over photos or videos, and then positioning them onscreen wherever you like. Plus, you can select background colours, gradients and patterns, adjust title and background durations, or even add a graphic or logo to make your mark.

Appear Anywhere

Transport yourself with green-screen effects.

Go everywhere you’ve always wanted to — without leaving home. With green-screen effects in iMovie for iOS and macOS, you can place yourself or your characters in exotic locations with a tap or a click. Masking controls and strength adjustments let you fine-tune the effect for maximum believability.

You have hundreds of videos. And one big dream to be a filmmaker. iMovie trailers let you quickly create fun, Hollywood-style film trailers from all that footage. Choose from a range of templates in almost any genre, pick your studio logo, and type in your film title and credits. Then add photos and videos to the storyboard. Whether you’re using an iPhone, iPad or Mac, you’ll have an instant blockbuster.

iMovie for iOS and iMovie for macOS are designed to work together. You can start cutting a project on your iPhone, then use AirDrop or iCloud Drive to wirelessly transfer it to your iPad. You can also send a project from your iPhone or iPad to your Mac for finishing touches like colour correction and animated maps. And you can even open iMovie projects in Final Cut Pro to take advantage of professional editing tools. Time to take a bow.

iMovie on MacBook Pro

You have a great touch
for making movies.

iMovie is even easier to use with MacBook Pro, featuring the revolutionary Touch Bar. The most useful commands automatically appear on the keyboard, just where you need them. And MacBook Pro easily powers through demanding 4K video projects so you can edit and export in record time.

iMovie on iPad Pro

A powerful performance in every movie.

iMovie delivers a tour de force on iPad Pro. Work with multiple 4K video clips. Create effects like green screen, picture‑in‑picture or split screen and play them back instantly. Use the all-new Magic Keyboard for iPad Pro with trackpad support for an extra level of speed and precision when editing. And with the USB‑C port on iPad Pro, you can connect to an external display to show others your latest cut in 4K while you work.

iMovie in the Classroom

Assignments that
come to life.

Engage your students through video storytelling. Students can use green-screen effects to go back in time for history projects, or create split-screen and picture-in-picture effects to report on current events. Drag-and-drop trailers make it even simpler to create beautiful, personal projects that look and sound great. And iMovie for iOS works with ClassKit, so teachers can assign projects to students, and students can easily hand in their finished assignments direct from the app.

Make Movie Magic.

iMovie is easy to use, and it’s free. Just click to download and install on your Mac or iOS device.

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Try Clips.

Clips is a free iOS app for making and sharing fun videos with text, effects, graphics and more.