Feral Heart

Alright, so recently I was able to *finally* download FH. I played for a while then decided that I wanted mass markings. I've searched on YouTube and the internet but sverything is outdated. I was able to download one of the mass markings, but I wasn't able to install it. If someone could possibly send a solid link to it and give me a step by step process, that'd be amazing! Also, I downloaded FH with PlayOnMac and xQuartz. Sorry if this is under the wrong thread or if it has already been said. I just need exact help. Thanks in advance!