맥북프로 2019년 15인치 macOS Catalina 10.15.6 에서 아래 설정 대로 해서 잘 동작 합니다. 1. Go to System Preferences > right click on TrackballWorks > remove and also remove KensingtonWorks software. 2. Open Finder in the computer 3. Click on “Go” in the menu bar on the top 4. Select “Go to Folder” and search for “~/Library” and return 5. Open “preferences” folder and please look for “com.kensington.trackballworks.setti..