Fix setting the default path on OSX
Fix setting the default path on OSX

Contributes to CURA-1987

totalretribution/Cura,senttech/Cura,hmflash/Cura,ynotstartups/Wanhao,fieldOfView/Cura,Curahelper/Cura,hmflash/Cura,senttech/Cura,totalretribution/Cura,ynotstartups/Wanhao,fieldOfView/Cura,Curahelper/Cura