I am happy to announce that I have just released MacHg 0.9.22.
MacHg 0.9.22 is primarily a bug fix release. There was an issue where if you double clicked on a file without changes in the last version MacHg would crash. This is now fixed. There are a number of other nice fixes in MacHg 0.9.22 but nothing critical. Take a look at the full change log for details!