Metin2 on macbook

Hello,
I would like to play metin2 (public serwer) on my MacBook. I trying to install metin with parallels desktop, virtual box and boot camp but I always get error with gameguard:
- " Gameguard has initial error. Please kill other conflict programs and restart game."

What can I do to play?

Reinstall the Game, close Firewall / Antivirus , close other programs, patch, or install on steam