installation issue

[ghost]

I have restored mac to factory setting updated to macOS Big Sur v 11.2.1, installed R version 4.0.4 (2021-02-15), R studio Version 1.4.1103 and Xcode Version 12.4 (12D4e).

I have an issue installing mrgsolve package using both options install.packages("mrgsolve") & remotes::install_github("metrumresearchgroup/mrgsolve@dev") but was not success.

I encountered the following issues:

1. install.packages("mrgsolve")

Installing mrgsolve [0.10.4] ...
OK (linked cache)

2. Downloading GitHub repo metrumresearchgroup/mrgsolve@dev

Error in utils::download.file(url, path, method = method, quiet = quiet, :
cannot open URL 'https://api.github.com/repos/metrumresearchgroup/mrgsolve/tarball/dev'

library(mrgsolve)
Error: package or namespace load failed for ‘mrgsolve’ in dyn.load(file, DLLpath = DLLpath, ...):
unable to load shared object '/Users/mmm/Library/Application Support/renv/cache/v5/R-4.0/x86_64-apple-darwin17.0/RcppArmadillo/0.9.900.2.0/8845285b6151967fb0d95678b7eee11a/RcppArmadillo/libs/RcppArmadillo.so':
dlopen(/Users/mmm/Library/Application Support/renv/cache/v5/R-4.0/x86_64-apple-darwin17.0/RcppArmadillo/0.9.900.2.0/8845285b6151967fb0d95678b7eee11a/RcppArmadillo/libs/RcppArmadillo.so, 6): Library not loaded: /usr/local/gfortran/lib/libgfortran.5.dylib
Referenced from: /Users/mmm/Library/Application Support/renv/cache/v5/R-4.0/x86_64-apple-darwin17.0/RcppArmadillo/0.9.900.2.0/8845285b6151967fb0d95678b7eee11a/RcppArmadillo/libs/RcppArmadillo.so
Reason: image not found

Thank you

[kylebaron]

@melagha I am moving this to our discussion area: https://github.com/metrumresearchgroup/mrgsolve/discussions

[kylebaron]

Library not loaded: /usr/local/gfortran/lib/libgfortran.5.dylib

Did you install the fortran compiler?
https://github.com/fxcoudert/gfortran-for-macOS/releases
Get the 8.2:
https://github.com/fxcoudert/gfortran-for-macOS/releases/tag/8.2

[ghost]

It worked after installing fortran compiler recommended .
Best regards