Hi @George W0311. Thank you for choosing Logitech! I'd be more than happy to assist you with your HD Webcam C270. How many USB ports does your MAC have? Have you tried restarting your Mac while your webcam is unplugged?
Record from your desktop computer While most laptop computers come with a built-in video camera, the same can’t be said for all desktop monitors. The only solution for those who wish to record video and take photos is to purchase an external webcam. They aren’t usable by simply plugging them into your computer, however. Logitech Webcam Software helps connect your webcam to your desktop and allows users to access settings and make adjustments that will benefit the overall picture quality and use. Take advantage of 720p or 1080p quality to make video calls, record video and audio or simply take a snapshot. By Anonymous This software does not support windows 8.1 according to the installer.