I can't open RCMDR. After going to the package installer, then installing RCMDR, this is what it says: The downloaded binary packages are in
/var/folders/z1/cx95gsrs2hd9cmnff2rwjd7r0000gn/T//RtmpceUwFz/downloaded_packages
then if I check the package manager, it still says RCMDR is not loaded. Appreciate the reply