With a design style similar to the C920, the C922 Stream Pro features a darker, black housing and mounting clip with standard tripod mount hole for the included mini desktop tripod. (The C922X 'X' model doesn't include the tripod.) Internally improved circuitry enhances the web camera's frame rates to now achieve up to 60 FPS at 720p HD resolution.1080p (which is very demanding no matter how you slice it) capture remains at 30 FPS. Both of these presume you have a very fast Intel CPU - ideally over 2GHZ. It should be noted many Apple computers like the Mac mini and MacBook Air often have much slower processors in the 1Ghz range, although Apple does support a 'Turbo' CPU up-clocking mode to temporarily ramp up the clock speed under demanding tasks when needed. On lesser Mac's you might not reach or sustain maximum frame rates possible.
H.264 video compression is supported on the C922 (as with all premium model Logitech cameras like the C930e, ConferenceCam Connect and Logitech Group.) This helps both frame rates and significantly reduces the size of the data stream or captured files saved to disk. It should also be noted that while the 920 had a Zeiss optics brand lens, the 922 makes no mention of Zeiss's trademark and like the C615 has switched to an optical-quality glass lens instead.
While touting it's optimization for Live Stream broadcasting, the 2 bundled apps/service they promote are WINDOWS ONLY. The Personify green-screen background app, and 3-month XSplit stream mixer subscription aren't supported on the Mac. However, as a UVC 1.5 spec compliant webcam rest assured it will perform admirably on Mac OSX (they recommend MacOS 10.9+) and it's settings can be further tweaked with the Logitech Webcam App or with a 3rd party program such as Mactaris or iGlasses.
The USB device specification limits reliable data transfers over a devices USB cable to around 5 meters or about 16 feet for High-Speed devices. The distance is a bit less for Low-Speed devices like keyboards and mice. An Active USB repeater extension cable can extend the webcam's distance considerably.
Active Repeater cables are available up to 100 feet. Some of the shorter one's simply reamplify and reclock the 5 volt signal coming from your Mac computer's port to extend a webcam (or any other USB device's) range. However for longer distances, you should look for USB extension cables that include a separate power-supply to adequately and reliably boost the signal. Extending a webcam with ordinary USB A-to-B extender cables will likely result in the device disappearing off the USB bus and possibly causing your video application to lock-up or crash.
For some, extending their Mac webcam via Ethernet cabling is preferred for ranges up to 300 feet. Above you see a pair of USB transceivers: One for your Macintosh's USB-A port, and the other end with a power-supply input and USB-B female socket to plug your web camera into.
Lastly, note extending SuperSpeed USB 3.0 devices (not webcams) required different, USB3 certified cabling and extenders. That's not an issue for Mac webcam users since NO web cameras made currently require nor operate at USB 3.0 speeds. All Apple-friendly UVC compatible webcams are USB 2.0 speed devices.
For a cheap name-brand webcam for MacOS 10.5+, Creative Labs Live! Cam Sync is a reasonable choice for a fixed focus 1080p HD web camera.
A quick re-test of this bargain 720p HD webcam from RocketFish led me to come up with it the best Apple compatible CHEAP webcam choice. It has a surprisingly clear and sharp image, good color balance, and a smooth auto-focus that isn't slow to respond like other cheapo AF cams I've tested. Decent-sounding microphone too. Quite a deal for around twenty bucks.
For about five dollars more, the Mac compatible Logitech C310 is superior to the cameras in it's C1XX and C2XX series range. Most notably it has a higher resolution sensor and supports RightLight2(tm) which adapts to low-light situations better than cheaper Logitech cameras without it. It's a Fixed-Focus camera with noise-canceling microphone. It's image is as good as or better than most built-in Apple iSight cameras with far greater flexibility in camera placement, angles and positioning.
When you go beyond 720p into 1080p HD mode you need A LOT of CPU horsepower AND internet bandwidth to handle a staggering amount of image data. So these 720p HD cameras have good frame-rates in every Mac video capture and conferencing app I tried. They also have a built-in microphone that sounds fairly decent - and as such are all good choices for a cheap Mac webcam with microphone solution for desktop Macs which don't come with any microphone at all, like the Mac mini and Macintosh Pro tower.