Update macOS build target to 13.0 for Metal3 (#14600)

diff --git a/build_tools/python_deploy/build_macos_packages.sh b/build_tools/python_deploy/build_macos_packages.sh
index 3283d37..2a57e1b 100755
--- a/build_tools/python_deploy/build_macos_packages.sh
+++ b/build_tools/python_deploy/build_macos_packages.sh
@@ -28,7 +28,7 @@
 
 # Note that this typically is selected to match the version that the official
 # Python distributed is built at.
-export MACOSX_DEPLOYMENT_TARGET=11.0
+export MACOSX_DEPLOYMENT_TARGET=13.0
 
 # cpuinfo is incompatible with universal builds.
 export IREE_ENABLE_CPUINFO=OFF