Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
There is a thread here that lists apps people have found to be compatible, and skimming that list the only RSS app that jumps out at me is Reeder.

Maybe others work too, and just nobody has tested yet.
 
I started using Newsflow after NetNewsWire turned into a paid app. It's a different design than most standard RSS apps, but I like it better than I thought I would!
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.