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Aquamacs vs Lem: catalog facts
Aquamacs	Lem
Free Free to download.	Free Free and open source.
macOS	macOS, Linux, Command line
Emacs editing with a Mac-oriented setup Supports LaTeX, HTML and many programming languages	Extensible in Common Lisp while running Emacs-like and Vim-like modes
macOS only Current stable release is based on an older Emacs; the newer version is still alpha	Extending it requires learning Common Lisp GUI is in transition from SDL2 to a webview version
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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