# Stan doesn't work in RStudio with multiple cores on Catalina

**URL:** <https://discourse.mc-stan.org/t/stan-doesnt-work-in-rstudio-with-multiple-cores-on-catalina/16294>\
**Category:** Modeling\
**Created:** [June 29, 2020, 11:48pm UTC](https://discourse.mc-stan.org/t/stan-doesnt-work-in-rstudio-with-multiple-cores-on-catalina/16294 "2020-06-29T23:48:34Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Aditya\_Kaushik](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/aditya_kaushik/32/6698_2.png) [@Aditya\_Kaushik](https://discourse.mc-stan.org/u/Aditya_Kaushik)\
**Post date:** [June 30, 2020, 12:09am UTC](https://discourse.mc-stan.org/t/stan-doesnt-work-in-rstudio-with-multiple-cores-on-catalina/16294/2 "2020-06-30T00:09:21Z")

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Appeared to find the solution here: [R 4.0.0 and CRAN MacOS binaries](https://discourse.mc-stan.org/t/r-4-0-0-and-cran-macos-binaries/13989/19)?

Be sure to change the R version in that solution to whatever R version you’re using.

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_[View the full topic](https://discourse.mc-stan.org/t/stan-doesnt-work-in-rstudio-with-multiple-cores-on-catalina/16294)._