Merge pull request #18339 from Homebrew/sequoia-sdk

os/mac: bump latest SDK version

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"

Library/Homebrew/os/mac.rb

@@ -55,7 +55,7 @@ module OS
     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) }