Fix (ugly) Safari 7.0 not using local pac file

I found that Safari in Mavericks is not using local proxy.pac at all. Turns out because of sandboxing, it will not allow reading file from local. A traditional solution is to turn on Web Sharing, and thus use HTTP to read the pac file such as http://localhost/proxy.pac.

However, this cannot be done that simple, since Apple removed Web Sharing from normal version of Mavericks. To turn on the web service (Apache), do this:

sudo apachectl start

Also, place the pac file under /Library/WebServer/Documents, which is the default Document Root of Apache.

Tom Fischer proposed another way to get around, however I don’t think it a good idea to mess around the system files.