GmailUser

Here is my fix. Works with Mojave. Requirements: You need Xcode or something else for editing .plist-files! Open the Activity Monitor.app. And Search for "skitch". Then open the Terminal.app. cd ~/Library/Containers find . -iname '*skitch*plist' results could look like this: ./J8RPQ294UB.com.skitch.SkitchHelper/Data/Library/Preferences/J8RPQ294UB.com.skitch.SkitchHelper.plist ./com.skitch.skitch/Data/Library/Preferences/com.skitch.skitch.plist ... Next step needs Xcode! Still in Terminal.app: open ./J8RPQ294UB.com.skitch.SkitchHelper/Data/Library/Preferences/J8RPQ294UB.com.skitch.SkitchHelper.plist Change the StartHelperAtLogin value: from StartHelperAtLogin: YES to StartHelperAtLogin: No And SAVE the file. Now do the same with com.skitch.skitch.plist: open ./com.skitch.skitch/Data/Library/Preferences/com.skitch.skitch.plist Don't forget to SAVE. Back in Activity Monitor.app. Quit the Skitch and Skitch Helper (use the lite "x"-icon). Now the Skitch Helper should only start when Skitch.app starts and should never re-spawn automatically if the processes were killed.