External Application??
- 6 years ago
@aleahjo1 I take it your Mac runs Catalina? If so, that's the issue: Sims 3 is a 32-bit app, and Catalina is 64-bit only. There's no way around this error. However, EA has announced a 64-bit-compatible version of Sims 3 for macOS, to be released hopefully some time this year. Here's the full announcement:
In the interim, your only options are to play on a different computer, to install Windows on your Mac (via Bootcamp or Parallels), or to install Mojave or earlier on an external hard drive or USB and boot into that when you want to play. Let me know if you want more information about the last two options.
If you only recently bought Sims 3 and don't want to wait for the new version, you can request a refund from EA:
https://help.ea.com/en-us/help/account/returns-and-cancellations/