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OpenEmu vs MAME: catalog facts
OpenEmu	MAME
Free The open-source application is available without a license fee.	Free Free and open source under the GPL 2.0. No ROMs are included.
macOS	Windows, macOS, Linux
Native Mac library interface with artwork and metadata handled for you One controller configuration applies across every emulated system	Covers thousands of arcade, console and computer systems in one program Accuracy is the stated priority, so behaviour matches the original hardware
macOS only Core updates depend on the OpenEmu team packaging them	Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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