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.settings.plist” and delete it
6. Also look for “com.kensington.kensingtonworks2.app.plist” and delete it
7. Restart the computer
8. Download the Kensingtonworks software from the below link
9. Install the software from the downloaded file
10. Restart the computer
11. Go to System Preferences > Security and Privacy > General
12. Check if the software is blocked in the general tab, if so allow it
13. Go to System Preferences > Security and Privacy > Privacy > Accessibility > check kensingtonworks Helper
14. Unplug the Trackball and plug it back in 15. Open Kensingtonworks and check the functionality
If the issue persists please get back to us with the result so that we can assist you better.
출처 : www.reddit.com/r/Trackballs/comments/fof1tr/kensingtonworks_never_recognizes_mouse/