Don't see an attachment, but here's what I got
> install.packages("dplyr", repo = 'https://mac.R-project.org')
Installing package into ‘/Users/rc/Library/R/3.6/library’
(as ‘lib’ is unspecified)
trying URL 'https://mac.R-project.org/bin/macosx/el-capitan/contrib/3.6/dplyr_0.8.4.tgz'
Content type 'application/x-gzip' length 6846395 bytes (6.5 MB)
==================================================
downloaded 6.5 MB
The downloaded binary packages are in
/var/folders/vw/p54wdfm95lq9wf8jkwxg_qpw0000gp/T//Rtmpk9J81c/downloaded_packages
>
> library(dplyr)
Attaching package: ‘dplyr’
The following object is masked from ‘package:MASS’:
select
The following objects are masked from ‘package:lubridate’:
intersect, setdiff, union
The following objects are masked from ‘package:stats’:
filter, lag
The following objects are masked from ‘package:base’:
intersect, setdiff, setequal, union
>