Merge pull request #347 from MikeMcQuaid/check_processor

install.sh: check processor.

install.sh

@@ -317,6 +317,19 @@ EOABORT
 )"
 fi
 
+UNAME_MACHINE="$(uname -m)"
+if [[ "$UNAME_MACHINE" == "arm64" ]]; then
+  abort "$(cat <<EOABORT
+Homebrew is not (yet) supported on ARM processors!
+Rerun the Homebrew installer under Rosetta 2.
+If you really know what you are doing and are prepared for a very broken experience you can use another installation option for installing on ARM:
+  ${tty_underline}https://docs.brew.sh/Installation${tty_reset}
+EOABORT
+)"
+elif [[ "$UNAME_MACHINE" != "x86_64" ]]; then
+  abort "Homebrew is only supported on Intel processors!"
+fi
+
 if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
   if version_lt "$macos_version" "10.7"; then
     abort "$(cat <<EOABORT