This is a problem of 1.0.0 Beta 3 After adding another repository to the file, MacHg shows for all Repositories a dummy file called "rcurialOutput:" which does not exists. But MacHg tries to handle, add, commit it and files because it is no file. This block all usage of the program.
You caught us doing some quick maintenance, temporarily restricting your repository to read-only access.
Issue #338 duplicate