I can't install packages successfully. For example:
install.packages("dplyr")
https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6/dplyr_1.0.7.tgz'
Content type 'application/x-gzip' length 1263811 bytes (1.2 MB)
==================================================
downloaded 1.2 MB
The downloaded binary packages are in
/var/folders/sg/txm59khs2bn1p34fzbkfq9d40000gn/T//RtmpvxLP11/downloaded_packages
library("dplyr", lib.loc="/Library/Frameworks/R.framework/Versions/3.6/Resources/library")
package or namespace load failed for ‘dplyr’ in dyn.load(file, DLLpath = DLLpath, ...):
‘/Library/Frameworks/R.framework/Versions/3.6/Resources/library/dplyr/libs/dplyr.so’::
dlopen(/Library/Frameworks/R.framework/Versions/3.6/Resources/library/dplyr/libs/dplyr.so, 6): Symbol not found: ___cxa_uncaught_exceptions
Referenced from: /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libc++.1.dylib
Expected in: /usr/lib/libc++abi.dylib
in /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libc++.1.dylib