Logitech has released a new webcam settings app for MacOS called 'Logitech Capture'. It's predecessor is 'Logitech Camera Settings' for OSX which is still available for download from it's support site. Capture is one of their more ambitious efforts to support an increasingly broader range of capture and streaming features for it's more recent Mac compatible pro webcams on the Apple platform.

Currently Supported Webcams On Mac OSX:
C920 HD PRO
C922 PRO STREAM
STREAMCAM
BRIO 4K PRO

Capture App Quick Feature Hitlist:
Muti-Camera Support. Picture In Picture. Text Overlays, Frames, Effects, Camera Adjustments, Chroma-Key and more.

Apple System/Hardware Requirements:
MacOS 10.14+ (Mojave / Catalina). Computer hardware recommendations are rather stiff: Higher powered Intel i5/i7 CPUs - Generally Mac's made 2017 and thereafter. It's unknown how well (or if) the webcam app runs on older MacOS versions, or on slower Macs.

Logi Capture Software Mac Download:
You can find more info about the Mac webcam application and Logitech Capture app's features - as well as links to download here. If you own other models of their cameras you can always download and try it.