knock (deprecated)

Install command: 
brew install --cask knock

Name: Knock

Unlock with AppleWatch

http://www.knocktounlock.com/

Cask JSON API: /api/cask/knock.json

Cask code: knock.rb on GitHub

Current version: 2.2.1

Current version requires: macOS >= 10.11

knock is built for Intel macOS and so requires Rosetta 2 to be installed.
You can install Rosetta 2 with:
    softwareupdate --install-rosetta --agree-to-license
Note that it is very difficult to remove Rosetta 2 once it is installed.

Analytics:

Installs (30 days)
knock 8
Installs (90 days)
knock 19
Installs (365 days)
knock 81
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