Hello, My cursor keeps disappearing . I solve the problem by closing the lid of the computer and it re-appears. But this is getting very frustrating. Do you have any solutions to this problem? I have a MacOSMojave 10.14.6. I don't want to upgrade to the new system as I believe I won't be able to run Adobe Digital #3 on it which is what I need to use to get library books for my Kobo. Thank you.