If you want to use chroma key effect in a streaming or video conference app, but you can't get a physical green screen background in place, you can fake it. All by using Background Replacement in macOS. You can do Chroma Key in OBS without a green screen, thanks to macOS. Whether it is streaming gameplay to Twitch or improving your Zoom calls, sometimes you want to replace the background with something else. It's unprofessional to have a background that includes piles of dirty clothes, random di