Hi, it's been years since I've run ES1 and I had long since deleted it from my Steam library. Tonight I wanted to give it a spin, so I reinstalled it. It crashed at startup. I turned off the Steam overlay and tried again. It played two opening videos (Amplitude and Iceberg Interactive), loaded an Endless Space splash screen, then crashed. 

The OS is High Sierra (10.13.6). I see the following in the system.log:

Aug 13 23:20:32 PROSPERO Endless Space[1534]: objc[1534]: Class VCWeakObjectHolder is implemented in both /System/Library/PrivateFrameworks/AVConference.framework/Frameworks/ViceroyTrace.framework/Versions/A/ViceroyTrace (0xa89dd120) and /System/Library/PrivateFrameworks/AVConference.framework/Versions/A/AVConference (0xa89f843c). One of the two will be used. Which one is undefined.

Aug 13 23:20:54 PROSPERO com.apple.xpc.launchd[1] (unity.AMPLITUDE Studios.Endless Space.174608[1534]): Service exited due to signal: Killed: 9 sent by Endless Space[1534]

Any ideas what I should try next?

Thanks in advance!