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nomacs vs Lyn: catalog facts
nomacs	Lyn
Free Free and open source under the GPL 3.0.	Paid Paid app with a fully featured 15-day free trial.
Windows, macOS, Linux	macOS
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Reads RAW, HDR and all formats macOS supports Non-destructive editing with curves and levels
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	macOS only Paid after the 15-day trial
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 24, 2026

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