On Yosemite, 1.1 update still zooms/pans C920
helpful tip - back the currently installed app up by copying and pasting the current one in the /Applications folder to your desktop, BEFORE updating.
but i find for me this still works like always. i am still on yosemite so maybe this is really a el capitan compatibility problem. forgive logitech, remember they are the best user friendly high quality innovators for almost any kind of usb or bluetooth accessory. never lost a bet on logitech overall. great bang for buck company.
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Logitech Camera Settings