How do I open separate named ChatGPT windows on macOS?

[Ducksss]

Launch each whole-window local-state context with a different profile name:

codex-profile app default
codex-profile app personal ~/Dev/personal-app
codex-profile app work ~/Dev/work-app

Different names can run side by side. A name selects both its CODEX_HOME and an Electron user-data directory under ~/.codex-<name>/electron-user-data, so the entire ChatGPT window can keep separate local state across Chat, Work, and Codex surfaces. Reusing the same name reuses that context.

The first launch of a new name may require signing in. codex-profiles launches the original signed ChatGPT.app; it does not duplicate or modify the application. It also does not read, copy, print, parse, upload, compare, or migrate tokens.

Whether a named Desktop window is signed into the same account as a similarly named Codex CLI profile is not verified by this tool. Server-side ChatGPT state and operating-system credentials remain outside the isolation boundary.

See Parallel Desktop windows and What does codex-profiles isolate, and what remains shared? for the complete behavior and boundary.