Loading Editor never loads

Hi, I’m using UE5 on MacOS. Several times the system has crashed when loading levels. Other times the lightbox appears, the top Overview bar loads to 100%, but the buttom “Loading Editor” bar only goes a little way and then hangs there. Nothing loads in the end and I have to quit through the Activity Monitor. Is there a setting that needs to be tweaked to let pre-fabricated levels and maps load?