--- vtkm/thirdparty/loguru/vtkmloguru/loguru.cpp	2025-04-10 02:09:45.000000000 +0800
+++ vtkm/thirdparty/loguru/vtkmloguru/loguru.cpp	2025-04-14 14:55:31.000000000 +0800
@@ -62,7 +62,8 @@
 #endif
 
 #ifdef __APPLE__
-	#include "TargetConditionals.h"
+	#include <AvailabilityMacros.h>
+	#include <TargetConditionals.h>
 #endif
 
 // TODO: use defined(_POSIX_VERSION) for some of these things?
@@ -956,7 +957,11 @@
 		if (buffer[0] == 0) {
 			#ifdef __APPLE__
 				uint64_t thread_id;
+			#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060 || defined(__POWERPC__)
+				thread_id = pthread_mach_thread_np(pthread_self());
+			#else
 				pthread_threadid_np(thread, &thread_id);
+			#endif
 			#elif defined(__FreeBSD__)
 				long thread_id;
 				(void)thr_self(&thread_id);