I absolutely love my new mouse, recommended to me by two friends independently of each other when I asked for a good MacOS mouse which was true Bluetooth and had wireless charging. Though the Logitech MX Master 3 doesn't have wireless charging, a 90 day charge life via USB 3-C connection made me reconsider, I think I made the right choice.
I had a massive mare getting the Desktop Gestures to work running a MacBook Pro (15-inch, 2017) with MacOS 10.15.3.
I tried the following things from Logitech's Support channel
- Ensured Logi Options and Logi Options Demon are allowed to access Input Monitoring and Accessibility (Under System Preferences > Security & Privacy > Privacy)
- Rebooted, uninstalled, reinstalled the Logi Options software
- Unpaired and paired the mouse using Bluetooth settings
When I tried to use the desktop gestures in Safari it is treated as a forward/back page and when I did the same gestures over the Logi Options page the window flashed. The press does option mission control.
I had no desktop switching keyboard shortcuts configured (in fact I had them all disabled). So I Restored Defaults in System Preferences > Keyboard > Shortcuts > Mission Control.