For a couple of days ago, Aspyr Media came with the news that the SimCity Complete Edition (the App-store-version of SimCity 2013), now is fixed, and the game only crashes in the tutorial after the MacOS 10.13.4-update. If you skip tutorial, the game works fine they say.
In DM, they told me:
As I foresaw, it seems like EA is pretending their fix never got released.