As Rally and other Logitech ConferenceCams are USB enabled, video, audio -- plus most other features -- is supported by Windows, Mac and Chrome natively through the UVC standard. (Wikipedia link to UVC definition https://en.wikipedia.org/wiki/USB_video_device_class Using the UVC standard, no driver installation is required to support your Rally or other Logitech ConferenceCam or webcam. (Windows 7 is the exception and may require a driver from Windows Update)
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A “driver” is a program for Windows that controls the operation of the device within the operating system. When a Logitech USB-connected device is plugged into a Windows-enabled computing system, Windows will automatically load and configure a driver software within Windows and notify when the installation is complete.
Operating Systems supported for Rally are:
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Windows 7, Windows 8.1, Windows 10
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macOS 10.14 or higher
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ChromeOS Version 69 or higher