The Sims 3 Patch 1.70 is an essential update released specifically for to maintain compatibility with modern Apple operating systems. While Windows users typically remain on version 1.67 or 1.69, version 1.70 was introduced to transition the game from a 32-bit to a 64-bit application , enabling it to run on macOS Catalina and later. Key Features and Fixes in Patch 1.70
Your Mac must support Metal and run at least macOS High Sierra (10.13). Guide to Installing Patch 1.70 The Sims 3 Patch 1.70 Download
If you use a Mac, you must use Patch 1.70. If you use Windows and hate the EA App, stick with Patch 1.67. If you use Steam, you have no choice but to use 1.70. The Sims 3 Patch 1