Hello,
I don't know if this is a Playmaker, Unity, or computer issue, but whenever I build my game (for Mac), run it, then change the volume of all things (using the volume keys on my computer), it freezes to a point where I have to force power off my entire computer then power it back on and it works fine. I was having some other issues with my computer before that I think I fixed (by calling Apple), but it seems to happen when I hit the volume keys. I tried changing the volume that way in the unity editor or anywhere else on my computer and no problems. My computer is not very powerful in terms of ram (only 8 GB I believe), but Ive never had this issue before. Not sure what's going on, but any advice at all would be greatly appreciated! Thanks!