diff --git a/docs/native-code/development/prerequisite-sw/index.md b/docs/native-code/development/prerequisite-sw/index.md
index e4d5d20..810c879 100644
--- a/docs/native-code/development/prerequisite-sw/index.md
+++ b/docs/native-code/development/prerequisite-sw/index.md
@@ -36,8 +36,13 @@
 
 ## macOS
 
-Xcode 9 or higher is required. Latest Xcode is recommended to be able to build
-all code.
+Xcode 12 or higher is required. Latest Xcode is recommended to be able to build
+all code. You may use `xcode-select --install` to install it.
+
+Absence of Xcode will cause errors like: 
+```
+xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
+```
 
 ## Android