I'm not sure if the repair permissions function is actually needed, since Apple started protecting system file permissionsin El Capitan and later, but it doesn't seem to have any detrimental effect.
Ekwenyesighi m ike ma ọ bụrụ na ịrụ ọrụ ikikere ịrụ ọrụ dị mkpa, ebe ọ bụ na Apple malitere ichebe ikikere faịlụ na El Capitan na mgbe e mesịrị, ma o yighị ka ọ nwere mmetụta ọ bụla.