diff --git a/Library/Homebrew/brew.sh b/Library/Homebrew/brew.sh
index db63e649e55b4..7719981db3318 100644
--- a/Library/Homebrew/brew.sh
+++ b/Library/Homebrew/brew.sh
@@ -520,6 +520,7 @@ esac
 # TODO: bump version when new macOS is released or announced and update references in:
 # - docs/Installation.md
 # - https://github.com/Homebrew/install/blob/HEAD/install.sh
+# - Library/Homebrew/os/mac.rb (latest_sdk_version)
 # and, if needed:
 # - MacOSVersion::SYMBOLS
 HOMEBREW_MACOS_NEWEST_UNSUPPORTED="16"
diff --git a/Library/Homebrew/os/mac.rb b/Library/Homebrew/os/mac.rb
index c017622bc82b3..29fa508f3f04e 100644
--- a/Library/Homebrew/os/mac.rb
+++ b/Library/Homebrew/os/mac.rb
@@ -55,7 +55,7 @@ def self.full_version=(version)
     def self.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("13")
+      ::Version.new("15")
     end
 
     sig { returns(String) }