Help with installing feralheart on a mac

[Fuzzy Door]

Whenever I try to reinstall feralheart it says that its opening the file and processing it. But, whenever I run the Icon it says it isn't able to and says that
The Application X11 cant be opened An error occurred while starting the X11 server: "Failed to activate core devices."

Click Quit to quit X11. Click Report to see more details or send a report to Apple. It hasn't done this since I last updated the OS El Capitan

[Insoholic]

Hello, there!
I'm not a Mac User, so I'll suggest you take a look at this thread: Shay's Guide to Feral Heart on a MAC.
Hope your problem will be solved soon.

[Warriorstrike]

I believe the cause of the issue is the Mac update. Since we are not able to change or update the game, the new Apple update is not compatible with Feral Heart. A few other users were having issues with this as well. Another user has created a sort of tutorial here regarding this problem that you may find helpful.