i tried too much to install devtools on my mac R studio but id doesn't , and this is the error appears:
Warning in install.packages :
installation of package ‘devtools’ had non-zero exit status
The downloaded source packages are in
‘/private/var/folders/gj/b_jyp39x3191_5x00dbjkckh0000gn/T/RtmpSEJ4zH/downloaded_packages’
Updating HTML index of packages in '.Library'
Making 'packages.html' ... done