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KMPlayer vs IINA: catalog facts
KMPlayer	IINA
Free Free to download and use.	Free Free and open source under the GPL 3.0.
Windows, macOS	macOS
Built-in codecs for most formats Plays 4K and 3D video	mpv decoding with a genuinely native macOS interface Picture-in-picture, gestures, Touch Bar and a standalone music mode
Closed source Little detail available from the official site about current features	macOS 11 or newer only Nightly builds exist but the project warns they may be unusable
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.