Logitech MX Master Frequently Asked Questions Manual page 19


In Security & Privacy go to the Firewall tab. Make sure the Firewall is on, then
click on Firewall Options.
left corner to make changes which will prompt you to enter the account
password.)
NOTE: On macOS, the firewall default settings automatically allow ports opened by
signed apps through the firewall. As Logi Options is signed it should be added
automatically without prompting the user.
4. This is the expected result: The two "Automatically allow" options are checked
by default. The "Logitech Options Daemon" in the list box is added automatically when
Flow is enabled.
5. If Logitech Options Daemon is not there, try the following:

Uninstall Logitech Options

Reboot your Mac

Install Logitech Options again
6. Disable Antivirus and reinstall:
(NOTE: You may have to click the lock in the bottom