iMovie Vertical Video on Mac – How to Edit and Export 9:16 Portrait Content

iMovie vertical video on Mac is possible, but it requires a workaround – the standard iMovie project on Mac is locked to a 16:9 landscape canvas with no setting to switch to portrait mode. Vertical 9:16 content for TikTok, Reels, or YouTube Shorts can be produced via two methods: the built-in App Preview project type, or a crop-rotate-QuickTime workflow. 

This guide covers both Mac methods honestly – what each one produces, where the limitations are, and which title styles and effects get lost along the way. 

iMovie vertical video on Mac – what it can and cannot do

Working with vertical video in iMovie on Mac is certainly possible, but it comes with distinct trade-offs you need to keep in mind. On the plus side, using the App Preview project type or leveraging a Crop-Rotate-QuickTime workflow allows you to export a native 9:16 (1080×1920) portrait file. However, iMovie’s core engine remains firmly locked to a 16:9 aspect ratio: standard projects will automatically letterbox vertical clips with black sidebars, custom ratios like 1:1 or 4:5 are completely unsupported, and switching to App Preview restricts your access to certain title styles, themes, and transitions.

How to make iMovie portrait Mode on Mac – app preview method

The App Preview project type is iMovie’s built-in way to work in a portrait canvas on Mac. It was designed for App Store preview videos, but it’s the cleanest how to make iMovie vertical option available without third-party software.

Step 1. Create a new app preview project

Open iMovie on your Mac. In the menu bar click File → New App Preview. A new project opens with a portrait 9:16 canvas visible in the preview window – the frame is taller than it is wide, ready for vertical video content.

Step 2.  Import Footage and Anchor the 9:16 Ratio

Click File → Import Media… and import your footage. For best results, add a vertical placeholder image or clip first – this anchors the project firmly to 9:16 before your main footage loads. Then drag your main video clips onto the timeline. Use the Crop to Fill tool in the preview toolbar to reframe each clip within the portrait canvas so the subject is centered vertically.

Step 3. Edit and export

Trim clips, add titles (note: some title styles are unavailable in App Preview mode), and add music via the Audio & Video tab. When finished, click File → Share → File…, set Resolution to 1080p, Quality to High, and click Next to save. If the exported file plays sideways in QuickTime Player, open it in QuickTime, go to Edit → Rotate Left or Right to correct the orientation, then File → Export As → 1080p to save the corrected file.

Input formats supported by iMovie

iMovie on Mac accepts these video formats for vertical video projects:

How to convert landscape to vertical in iMovie on Mac

To take a standard 16:9 landscape clip and make it display as a vertical 9:16 video, use iMovie’s Crop-and-Rotate method. This crops the center of the landscape frame and rotates the export for portrait playback.

Step 4. Import the Landscape Clip and Apply Crop to Fill

Open a standard iMovie Movie project. Import the landscape video via File → Import Media… and drag it to the timeline. Select the clip and click the Crop icon in the preview toolbar. Choose Crop to Fill. A yellow crop frame appears over the preview. Drag the handles to select only the vertical center portion of the landscape frame – the column containing your subject. Click the blue checkmark to apply. 

Step 5. Rotate the сlip 90° in clip Information

With the clip selected in the timeline, click the Clip Information button above the preview. The Clip Information panel opens. Click the Rotate 90° counterclockwise button (or clockwise, depending on the footage orientation). The clip now appears sideways in the 16:9 canvas. This sideways orientation is intentional – the final rotation back to upright will be done in QuickTime Player after export.

Step 6. Export from iMovie and rotate in QuickTime Player

Click File → Share → File…. Set Resolution to 1080p and Quality to Best. Click Next and save. Open the exported file in QuickTime Player. Go to Edit → Rotate Left (or Rotate Right) to correct the orientation – the clip now displays upright in portrait. Go to File → Export As → 1080p to save the final file. QuickTime writes the orientation flag without re-encoding, so quality is preserved. The result is a true 1080×1920 vertical video file.

Output formats supported by iMovie

iMovie vertical video alternative – Movavi Video Editor

Movavi Video Editor is the practical alternative that solves every limitation of iMovie portrait mode on Mac. Set the canvas to 9:16 in Settings in one click – every title style, transition, color tool, and effect works normally within the vertical frame. No App Preview restrictions, no QuickTime rotation step, no black bars.

Available as a free download for Mac and Windows PC at movavi.com/videoeditor. The 7-day trial unlocks every feature including the 9:16 canvas, AI Auto Subtitles, all export formats, and the full effects library. The paid version removes the watermark.

How to edit vertical video using Movavi Video Editor

Three steps to a clean 1080×1920 vertical video export on Mac – no workarounds.

Step 1. Import the video and set 9:16 aspect ratio 

Launch Movavi Video Editor and click Add Files to import your video. Drag the clip onto the timeline to begin working with the file. Open the aspect ratio list under the preview window and select 9:16 so the canvas immediately switches to a portrait frame.

Step 2. Change video dimensions and frame the clip 

Use the crop tools and preview window to adjust selective framing within the vertical canvas. You can enter exact width and height values or position the footage directly – the editor functions as a precise video size changer, not a generic converter.

Step 3. Export the video 

When the frame looks correct, click Export to open output settings. Choose MP4 and ensure the resolution is set to 1080×1920 for the final file. The software applies resizing cleanly, avoiding unnecessary compression and exporting a true portrait video without black bars.

Conclusion

iMovie vertical video on Mac requires a workaround in @year – there is no native portrait project setting in the standard Movie project type. The App Preview method creates a true 9:16 canvas but limits some editing features. The crop-rotate-QuickTime method works for converting any landscape source to portrait, at the cost of extra steps.

For a Mac workflow with a native vertical 9:16 canvas, all title styles, and no post-export rotation steps, Movavi Video Editor is the cleaner software. It’s available as a free trial download that covers the complete portrait editing workflow from import to export.

FAQ

Can iMovie do vertical videos on Mac?

Yes, with workarounds. iMovie on Mac does not have a native portrait mode in the standard Movie project. Two methods work:

1. File → New App Preview. Creates a 9:16 canvas directly, but limits some title and theme options.

2. The Crop–Rotate-QuickTime method. Converts any footage to a true 1080×1920 vertical file using extra steps.
3. Dedicated vertical video software (like Movavi Video Editor).Sets the 9:16 canvas in one click with no feature loss, avoiding the workarounds of the other two methods.

How do I change the orientation of a video in iMovie on Mac?

To change clip orientation in iMovie on Mac:

1. Select the clip in the timeline.

2. Click the Clip Information (i) button above the preview window.
3. Use the Rotate 90° buttons (clockwise or counterclockwise arrows) to adjust the clip’s display within the 16:9 canvas.
4. Export the project from iMovie.
5. Open the exported file in QuickTime Player.
6. Go to Edit → Rotate to set the correct orientation.
7. Go to File → Export As → 1080p to save your true portrait output file (QuickTime preserves video quality by writing an orientation flag rather than re-encoding).

Why does iMovie cut off vertical video on Mac?

iMovie on Mac cuts off vertical video because the standard project canvas is 16:9. When you add a 9:16 portrait clip, iMovie either fills the 16:9 frame by zooming in and cutting off the top and bottom (Crop to Fill behavior) or adds black bars on the sides (Fit behavior). To avoid cropping: use Fit in the Crop settings to see the full frame with black bars, or switch to the App Preview project type for a portrait canvas where vertical clips display without being cut off. Movavi Video Editor’s 9:16 project setting also prevents this completely.

How do I change iMovie aspect ratio to portrait on Mac?

On Mac, the direct way how to make iMovie vertical with a portrait canvas:
1. Go to File → New App Preview in iMovie to create a native 9:16 portrait project canvas.

2. Import footage, edit, and export your project at 1080p resolution.
3. Correct orientation in QuickTime Player (if the output is sideways) via Edit → Rotate → File → Export As → 1080p.

Use a one-step alternative (like Movavi Video Editor):

1. Install Movavi Video Editor (available as a free trial download).

2. Open Settings by clicking the gear icon near the preview window.
3. Set Aspect Ratio to 9:16.

The canvas switches to portrait instantly and every editing feature works normally.