Crash when open a map which contain hundreds of actors on mac

crash when open a map which contain hundreds of actors.log file below
This issue troubles us for a long time and didn’t find a method to work around with it. It crashes randomly. Sometimes not crash at all. But it crashes much more frequently these days. What exactly cause the crash?

Hi wukakuki;

We have found and identified your bug in our crash reporter data. It appears to be a rendering issue on Macs. Given this information, if you can isolate this crash down to a specific metalic or reflective material, it would be useful to us in helping to resolve this issue.

Thanks,

.