요세미티로 업그레이드 후 web sharing이 안되면 아래 링크 참고

그냥 검색하는게 짱인듯.

https://www.computersnyou.com/3376/setup-apache-php-mysql-macosx-10-10-yosemite/

http://stackoverflow.com/questions/25250566/apache-localhost-403-error-with-yosemite