Google Chrome Canary browser for Mac is released.Google Chrome Canary for Windows was released last year.
Chrome Canary for Mac is unstable and unusable at times as the builds are not tested before the release.It is advisable to the users to use it along with a stable version of Chrome.
Currently Chrome 11 is the stable version whereas Canary is version 13
According to the official blog -
The Mac version of Google Chrome Canary follows the same philosophy: it automatically updates more frequently than the Dev channel, and does not undergo any manual testing before each release. Because we expect it to be unstable and, at times, unusable, you can run it concurrently with a Dev, Beta, or Stable version of Google Chrome. Your Canary data remains separate, but if you set up Sync in each version of Chrome that you use, you can automatically continue using the same set of bookmarks, extensions, themes, and more.
Chrome Canary for Mac requires Mac OS 10.5 or higher.