Update Mac prerequisites
Bug: None
Change-Id: I31aeecd15d05c262d0c1654a8c46ccca7cdfc069
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/229588
Commit-Queue: Andrey Logvin <landrey@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#34831}
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
