Recording Internal Audio from Mac Games / OBS settings

I have tried to record the internal audio on my Mac with Quicktime and at first I thought blackhole would work since the YouTube videos I saw did record that audio but as soon as enter one my app games on my Mac and try to record with Quicktime I still get no audio from it. Is there another method or another option I can go to. I am starting a gaming channel with Mac/Arcade games available and I really would like the audio from the games. I also have tried OBS but I can't seem to get the settings right for recording, if anyone one has any recommendations on those that would be also helpful. Again this is just for recording settings, I just want gameplay to come out smooth and not choppy and glitchy. Games vary from NBA 2K to Hello Kitty Island to Lego Star Wars & more heavy duty games.