IINA's user interface and foundation are designed to make it a contemporary macOS application. It follows the latest advancements in technology, such as Force Touch, Touch Bar, and Picture-in-Picture, and incorporates the macOS design language introduced with Yosemite.

For the macOS Mojave dark mode, IINA comes with a meticulously designed user interface that features modified colors, icons, and textures for a streamlined and cohesive appearance.

With IINA's support for the native Picture-in-Picture mode, you may watch videos locally or online without being interrupted.