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

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