Razer Kiyo Ring Light Webcam Mac Compatible?
From a video I've seen on YouTube, the Kiyo was demonstrated on a MacBook pro confirming the cam is UVC compliant and works under OSX 10.5 and beyond up to the current MacOS Catalina.
Apparently something was amiss with the initial audio hardware or implementation at Razer (who otherwise specializes in flashy, high-end Windows gaming peripherals.) The Kiyo webcam with built-in ring light needed a firmware update to correct some issues. The updater only ran on Windows. As such, Razer's lack of explicit support for Mac made the earliest versions of the camera a less-than-optimal choice for Macintosh users shopping for an external USB Mac compatible webcam.
One alternative is a rather pricey and high-end webcam / mic / ringlight / USB hub combo: Check out the Marantz Turret Pro Broadcaster instead which is worth a look-see if you're looking for a 1-piece audio - video conferencing / streaming webcam with ringlight that IS Mac OSX compatible. There's also several generic brand ringlight cameras appearing on Amazon that have a simialr ringlight design around the webcam lens.