Thanks to help under the question "Cannot install R-bridge on Parallels virtual machine", 'arcgisbinding' now appears in my list of packages in R Studio, but I get the following error messages when I try to load it:
ERROR#1 (pop-up "rsession.exe - Entry Point Not Found"):
"The procedure entry point AddDIIDirectory could not be located in the dynamic link library KERNEL32.dll."
ERROR#2 (R console):
Error: package or namespace load failed for ‘arcgisbinding’:
.onLoad failed in loadNamespace() for 'arcgisbinding', details:
call: inDL(x, as.logical(local), as.logical(now), ...)
error: unable to load shared object '//Mac/Home/Documents/R/win-library/3.5/arcgisbinding/libs/x64/rarcproxy_pro.dll':
