Last year, we introduced TotalFinder 1.3.5 to fully support Mac OS X 10.8 Mountain Lion. We’re now at TotalFinder 1.4.18 and will continue to support Mountain Lion for the foreseeable future.
We are porting TotalFinder to Mac OS X 10.9 Mavericks and anticipate being fully ready when Mavericks is officially released in the fall.