Because the 32-bit and 64-bit versions are distinct, you must install version 1.70 from scratch. It will not update an existing 32-bit installation.
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 The Sims 3 Patch 1.70 Download
Fixes a glitch where the Cmd + Z and Cmd + Y commands would repeat indefinitely. Because the 32-bit and 64-bit versions are distinct,
Corrects the bug where the application icon would appear hidden or invisible in the dock. While Windows users typically remain on version 1
The primary purpose of this version is to make the game compatible with 64-bit-only macOS versions (Catalina, Big Sur, and beyond) using Apple's Metal graphics API .
Corrects an issue where DLC icons would not light up correctly in the game launcher. How to Download and Install Patch 1.70
Your Mac must support the Metal API . This includes most Macs released from 2012 onwards. Important Compatibility Notes Why can I not find the newest patch | EA Forums - 8322837