najdi si v home/library/preferences „com.apple.LaunchServices“ a vysupni ho do kosa a potom si znovu nadefinuj otvaranie suborov v prislusnych aplikaciach
ak to nepomoze tak terminal spusti a toto vloz
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user