Recognize CLT SDK
https://github.com/nlitsme/cpputils/issues/3
https://github.com/nlitsme/cpputils/pull/4
--- cmake_find/boilerplate.cmake.orig	2024-11-06 14:36:11.000000000 -0600
+++ cmake_find/boilerplate.cmake	2024-12-06 10:41:38.000000000 -0600
@@ -22,7 +22,7 @@
         set(IPHONE TRUE)
     elseif (${CMAKE_OSX_SYSROOT} MATCHES "/iPhoneSimulator.platform")
         set(IPHONESIM TRUE)
-    elseif (${CMAKE_OSX_SYSROOT} MATCHES "/MacOSX.platform")
+    elseif (${CMAKE_OSX_SYSROOT} MATCHES "/MacOSX.*\.sdk$")
         set(MACOS TRUE)
     else()
         message(FATAL_ERROR "Unsupported apple platform")