Step 1: Open terminal

Step 2:

cd ~
touch .Renviron
open .Renviron

Step 3: Save the following as the first line of .Renviron:

R_MAX_VSIZE=100Gb 

As noted in the source, Sys.setenv('R_MAX_VSIZE'=32000000000) only works in command line, doesn’t work for Rstudio

Source:
https://stackoverflow.com/questions/51295402/r-on-macos-error-vector-memory-exhausted-limit-reached