I was one of the main people that tried to port uBO Lite to Safari. uBO isn't possible to port because Safari doesn't support the relevant APIs. uBO Lite is also not possible, despite supporting _most_ of the APIs (IIRC), the ones that are essential for a MVP aren't available on Safari. With that said though, it's possible to use Apple's Safari-specific API to build an ad blocker for Safari that might actually be better than uBO Lite.
