--- libmalloc/libmalloc-374.120.1/src/pgm_malloc.c
+++ libmalloc/libmalloc-374.40.6/src/pgm_malloc.c
@@ -1113,7 +1113,7 @@
 	return true;
 }
 
-#if TARGET_OS_WATCH || TARGET_OS_TV
+#if TARGET_OS_WATCH
 static bool
 is_high_memory_device(void)
 {
@@ -1131,14 +1131,12 @@
 	if (FEATURE_FLAG(ProbGuard, true) && should_activate(internal_build)) {
 #if TARGET_OS_OSX || TARGET_OS_IOS
 		return true;
-#elif TARGET_OS_WATCH || TARGET_OS_TV
-		if (is_high_memory_device()) {
+#elif TARGET_OS_TV
+		if (internal_build) {
 			return true;
 		}
-#elif TARGET_OS_DRIVERKIT
-		// Never enable for DriverKit
-#else
-		if (internal_build) {
+#elif TARGET_OS_WATCH
+		if (internal_build && is_high_memory_device()) {
 			return true;
 		}
 #endif
@@ -1200,7 +1198,7 @@
 	// Approximate a (1 / sample_rate) chance for sampling; 1 means "always sample".
 	zone->sample_counter_range = (sample_rate != 1) ? (2 * sample_rate) : 1;
 	bool strict_alignment = env_var("MallocProbGuardStrictAlignment") ? env_bool("MallocProbGuardStrictAlignment") : FEATURE_FLAG(ProbGuardStrictAlignment, false);
-	zone->min_alignment = (strict_alignment && MALLOC_TARGET_64BIT) ? 1 : 16;  // Darwin ABI requires 16 byte alignment.
+	zone->min_alignment = strict_alignment ? 1 : 16;  // Darwin ABI requires 16 byte alignment.
 	zone->signal_handler = env_bool("MallocProbGuardSignalHandler");
 	zone->debug = env_bool("MallocProbGuardDebug");
 	zone->debug_log_throttle_ms = env_uint("MallocProbGuardDebugLogThrottleInMillis", 1000);