“ScreenCaptureKit allows for the cursor, applications, or windows to be excluded from a display capture.”
Apple engineers sent OBS a pull request to use a new macOS capture API, tested on Baldur’s Gate 3 and Shadow of the Tomb Raider. Apple rarely writes code for someone else’s open source app. It did here because streamers on Macs were a gap Apple wanted closed. Open source got free work from Apple because it served Apple’s platform.