The Cangjie & Simplex input method for macOS

Yahoo! KeyKey, rebuilt for modern macOS

The classic Yahoo!奇摩輸入法 Cangjie (倉頡) and Simplex (速成) input method, reborn — native, fast, and open source.

GitHub release Ways to get it

Latest 2 macOS · 7 languages · 3 channels

See it in action

倉頡 + 速成 input

Both classic modes — full Cangjie (倉頡) and Simplex (速成) — with wildcard * matching when you don't remember every radical.

Frequency-ranked & adaptive

Candidates are ordered by how common they are, and the characters you pick rank higher over time — so your most-used words rise to the top.

Associated phrases (聯想字詞)

After you commit a character, Yahoo KeyKey 2 suggests the words that usually follow — so common phrases come together in a single keystroke.

What's new

Plain-language notes, newest first.

2.19.0
Yahoo! KeyKey 2 now uses the latest version of its shared toolkit. Nothing you use has changed. · Yahoo! KeyKey 2 is now built with DragonKit 4.4.0, the shared toolkit behind its Settings window. Typing, the candidate list, your settings and your learning data work exactly as they did in 2.18.1.
2026-11-07 · View on GitHub →
2.18.1
Update checks now use the app's current web address. Nothing else in Yahoo! KeyKey 2 has changed. · Yahoo! KeyKey 2 now checks for updates at the app's current web address. Nothing else changed. Typing, the candidate list, your settings and your learning data behave exactly as they did in 2.18.0.
2026-11-04 · View on GitHub →

From each release's What's New pane in the app

Ways to get it

Easiest · free

GitHub release

Get the latest release
Terminal · one command

Homebrew

brew install --cask teddychan/tap/yahoo-keykey-2
Coming soon

Mac App Store

Coming soon
Support development

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Need help?

Questions, bug reports, and feature requests are welcome — open an issue on GitHub and I'll take a look.

Open an issue on GitHub

In tribute

Yahoo KeyKey 2 is an independent, open-source rebuild in Swift, created in tribute to the original Yahoo! KeyKey (Yahoo!奇摩輸入法) — the Traditional-Chinese input method many Mac users loved. It carries that experience forward for modern macOS, released under the MIT License.

Latest 2 macOS 7 languages 3 channels Free and open source
Why I build & maintain these →