[macOS] Implement new directories hierarchy (#8741)

images/macos/assets/xamarin-selector/select-xamarin-sdk.sh

@@ -0,0 +1,22 @@
+#!/bin/bash -e -o pipefail
+if [ -z "$1" ]; then
+  echo "No Xamarin SDK specified."
+  exit 0
+fi
+
+XAMARIN_SDK=$1
+
+echo "Set Xamarin SDK to ${XAMARIN_SDK}"
+FOLDERS_LIST=(
+        '/Library/Frameworks/Mono.framework/Versions'
+        '/Library/Frameworks/Xamarin.iOS.framework/Versions'
+        '/Library/Frameworks/Xamarin.Android.framework/Versions'
+        '/Library/Frameworks/Xamarin.Mac.framework/Versions'
+    )
+
+for FOLDER in "${FOLDERS_LIST[@]}"
+do
+    echo "Set Current folder for ${FOLDER}"
+    sudo rm -f ${FOLDER}/Current
+    sudo ln -s ${FOLDER}/${XAMARIN_SDK} ${FOLDER}/Current
+done