Re: SimCity on macOS Catalina

Hi  - Kudos on thinking ahead before you install Catalina! Unfortunately, there is no update or patch from EA for SimCity 2013. As it is now a legacy game, EA will not be issuing any patches to make it 64-bit.

If you purchased the game from Aspyr, they have indicated that they will be porting most of their 32-bit titles to 64-bit versions https://support.aspyr.com/hc/en-us/articles/360000214186-MacOS-Catalina-64-bit-32-bit-and-related-Questions. SimCity is not on the "removed" list, so I am assuming it will be available as 64-bit for Catalina. (Be aware Aspyr's version is single player only)

If you want to continue to play SimCity while updating to MacOS Catalina, you have a couple of choices. You can create a bootable external drive running Mohave, install a virtual machine running Mohave, or consider bootcamping your Mac and installing Windows. 

Here is an excellent breakdown by   of How to Run 32-bit Apps after a Catalina Upgrade. In this post, your choices are clearly outlined, and detailed instructions are given for dealing with this transition. I hope this helps you decide how to go forward with your upgrade. Happy Building!