[R-pkg-devel] Minimum macOS version ?

One package I stand behind as maintainer does

  ## Take care of 10.14 requirement for Intel macOS
  if test x"${uname}" = x"Darwin" -a x"${machine}" = x"x86_64"; then
      AC_MSG_CHECKING([for Darwin x86_64 use minimum version override])
      CXX17_MACOS="-mmacosx-version-min=10.14"
      AC_MSG_RESULT([${CXX17_MACOS}])
  fi

We now contemplate going to 10.15 as minimum macOS version. Is that an issue
for CRAN?

Apologies for the somewhat ignorant question but I was not aware where I
could have looked this up. So thanks in advance for any pointers.

Thanks,  Dirk

dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org