Released in April 2018, served as a targeted maintenance update for macOS High Sierra (10.13.2+) users. While it successfully introduced essential support for modern mobile formats like the iPhone X , its reception was polarized due to performance regressions and a continued departure from the beloved workflow of iMovie 9. Key Features & Enhancements
: Added specific support for iPhone X and updated iPad resolutions for creating App Store video previews. iMovie 10.1.9
: Users reported significant slowdowns in import times—sometimes jumping from minutes to over an hour—and frequent "Can't Encode" errors during export. Released in April 2018, served as a targeted
The primary focus of this version was compatibility with the contemporary hardware and media of the time: Released in April 2018
Whether you're or looking to switch from an older version
iMovie 10.1.9 slow import from sd card - Apple Support Community
Despite the bug fixes, many veteran users remained critical of the version 10 architecture: