Google's Chrome Canary, a "pre-developer" version of the Chrome browser intended to be tested by "the bravest" of users -- people who would be comfortable with bugs and instability -- now has a Mac version available, according to the company's Chromium blog. The release follows the initial version of Canary for Windows last year, which the company says helped further development and gather feedback on Chromium and Chrome. The Mac version, like the Windows version, is a frequently-updated and completely untested build of what is expected to eventually become Chrome v13