Which macOS feature allows you to use your iPhone as a webcam?

The feature that enables you to use your iPhone as a webcam on macOS is Continuity Camera. This functionality allows you to take advantage of the high-quality camera on your iPhone during video calls or recordings on your Mac. Continuity Camera automatically detects your iPhone when it's in close proximity to your Mac and offers it as an option for video input, allowing for seamless integration and convenience.

By using Continuity Camera, users can benefit from features like Center Stage, which keeps the subject in focus and well-framed, enhancing the overall quality of video communication. This feature represents a significant advancement in the integration of Apple devices, creating a more cohesive and functional user experience.

The other options, while features of macOS, do not provide the capability to use an iPhone as a webcam. Focus is related to managing notifications and setting focus modes, Stage Manager helps with multitasking by organizing windows, and Quick Look provides a fast way to preview files and documents. Each serves a different purpose in the macOS ecosystem but does not involve using an iPhone as a webcam.