thank you very much!

I've found what was the problem

"AppCleaner And Uninstaller" was blocking ViscosityHelper from launching
I checked ViscosityHelper checkbox in "AppCleaner And Uninstaller" launch agents menu and Viscosity successfully start

thank you for your answer! I have found in Console such errors Viscosity AEGetDescData of non-desc type 'reco' not a good idea // and tccd Prompting policy for hardened runtime; service: kTCCServiceAppleEvents requires entitlement com.apple.security.automation.apple-events but it is missing for ACC:...

Hi! After upgrading Viscosity to version 1.8.1 and run I get message "Viscosity was unable to install its helper tool and must now quit. Please reopen Viscosity to try again." as a result I can not run Viscosity I uninstalled Viscosity with "App Cleaner and Uninstaller". Reboot. ...