Red Alert wont start after Mac update

[Heraclitus]

Played Red Alert for a while via the CnCNet download and via Porting Kit. Today, after an automatic update which required the computer to restart (not sure what was updated), none of these work anymore. I start the application but nothing happens. I tried reinstalling, restarting computer, clearing Porting Kit caches, etc. To no avail. Anybody else have this problem?

 

Edit: iMac late 2012, macOS Mojave 10.14.2, 2.9GHz i5, 8GB memory

Edited April 6, 2019 by Heraclitus