diff --git a/Library/Homebrew/os/mac.rb b/Library/Homebrew/os/mac.rb
index 116d69ed8e..46d3652ef9 100644
--- a/Library/Homebrew/os/mac.rb
+++ b/Library/Homebrew/os/mac.rb
@@ -45,7 +45,7 @@ module OS
     def latest_sdk_version
       # TODO: bump version when new Xcode macOS SDK is released
       # NOTE: We only track the major version of the SDK.
-      ::Version.new("11")
+      ::Version.new("12")
     end
     private :latest_sdk_version