
Share to social platforms in iMovie on Mac
You can prepare a movie, trailer, or clip for sharing to popular video-sharing websites. You can only share one item at a time.
- In the iMovie app  on your Mac, select a movie, trailer, or clip in the browser. on your Mac, select a movie, trailer, or clip in the browser.
- Choose File > Share > Social Platforms. 
- In the dialog that appears, do any of the following: - Set the title of the shared movie: Click the name at the top, and type a new name. 
- Set the description of the shared movie: Click in the Description field, and type new text. 
- Set tags for the shared movie: Click in the Tags field, and type tag names separated by commas. 
- Set the resolution of the shared movie: Click the Resolution pop-up menu and choose an option. 
- Speed up the export with simultaneous processing: Select the “Allow export segmentation” checkbox to speed up exports of projects that are approximately 3 minutes or longer. iMovie sends segments of your video to available media engines for simultaneous processing. - Note: Export segmentation requires macOS Sonoma or later and a Mac with Apple M1 Max, M1 Ultra, M2 Max, M2 Ultra, or M3 Max. 
  
- Click Next. 
- Enter a name for the output media file, navigate to a location on your Mac or storage device where you want to save the file, and click Save. - Your project is saved in a format suitable for sharing on social platforms. - A progress indicator appears on the right side of the toolbar. Click the progress indicator to see details. The indicator disappears when the operation has finished.  
- Follow the instructions from the website or platform to upload the file using a web browser such as Safari.