npm

xorg-server

X Window System display server for graphical environments

brewmacoslinux
Try with needOr install directly
Source

About

X Window System display server

Commands

XvfbXorgX

Examples

Start a virtual X server on display :99$ Xvfb :99 -screen 0 1024x768x24
Run an application on a virtual display$ DISPLAY=:99 firefox
Start X server with specific configuration file$ Xorg -config /etc/X11/xorg.conf :0