Can't launch UE 4.26.2 on Mac High Sierra

Hi, newbie here. I just installed Unreal Engine on my Mac running on High Sierra. RAM: 8GB, HDD: about 60GB. I am unable to launch Unreal Engine 4.26.2 nor 4.13.2. I’m not a programmer and I have basic computing skills. What can I do? There is no error code. When I click on the launcher, I am taken back to the finder screen and nothing else happens. I’ve tried waiting for an hour as well as a day. I’ve tried to restart my Mac. What else can I do?