
how to enable HiDPI resolutions for external monitor on your macbook!
First: Turning Off Rootless System Integrity Protection in Mac OS X Reboot the Mac and hold down Command + R keys simultaneously after you hear the startup chime, this will boot Mac OS X into Recovery Mode When the “MacOS Utilities” / “OS X Utilities” screen appears, pull down the ‘Utilities’ menu at the top... » read more