This is what it says when I try to install swirl
install.packages("swirl")
trying URL 'http://ftp.osuosl.org/pub/cran/bin/macosx/contrib/4.0/swirl_2.4.5.tgz'
Content type 'application/x-gzip' length 347939 bytes (339 KB)
==================================================
downloaded 339 KB
The downloaded binary packages are in
/var/folders/rz/65_c1vy17vl2rjnbk_w_d6ym0000gn/T//Rtmpvk6qEj/downloaded_packages