Sims 3 Expansions Installation - Installer Can't Open

by Guest Sun 22 Oct 2017, 21:04

Hi, I'm following the steps in the Mac installation guide and using Stuffit Expander to unzip the .rar files, and then mounting DMGs using Disk Utility. The base game will install fine, but none of the expansions I have tried will work. The same error message shows up saying that the installer can't open. I've tried to install both World Adventures and High End Loft Stuff with the same result (the guide recommended installing expansions in the order of release if possible). Can anyone suggest any solutions?

If it helps, I'm running OS Sierra, 10.12.6. I can post further specs if needed. Thank you!