Unable to get Stan working with R 3.5.1 and Catalina 10.15.2

Developers
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21

No such file when I search in finder.

22

Please read again my post which Ben linked.

23

So I found the file, but I am not permitted to edit it. I even try your solution here of opening it in Rstudio. It automatically changes to Makevars.makefile, rather than Makevars.

Thank you for your patience…

24

Ok, so when I fix that Makevars file and run the Rccp file, now I get this error:

clang-7: error: no such file or directory: '/Library/Frameworks/R.framework/Resources/lib/libc++abi.1.dylib'
make: *** [sourceCpp_2.so] Error 1