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Parallel Launcher vs Rosalie's Mupen GUI: catalog facts
Parallel Launcher	Rosalie's Mupen GUI
Free Free to download, with source code published on GitLab.	Free Free and open source.
Windows, macOS, Linux	Windows, Linux
Much simpler controller setup than RetroArch Automatic ROM loading and settings	Simple interface over the Mupen64Plus core Netplay support
Nintendo 64 only Mac build is Intel x86_64, though it loads an ARM emulator core on ARM machines	No macOS build mentioned Netplay needs port forwarding or a server
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	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 23, 2026

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