Another Mojave problem - slow startup/access to internet
I realize there are already some bug/quirk reports on Mojave. But I think this one is slightly different.
Starting up OpenSesame takes ~5 minutes with my computer being generally frozen. After that I get a warning that OpensSesame could not check for updates, and asking whether I am connected to internet (I am). This happens on different networks, so I doubt it's a connection problem. I also tried rebooting my system but that didn't help. I also get long delays when clicking on a help button that leads to opening a youtube video.
After this slow startup, OpenSesame works well and smoothly, so I don't think that it has much to do with OpenGL -Daniel's suspicion about the culprit for Mojave-related problems.