diff --git a/src/Reactor/ExecutableMemory.cpp b/src/Reactor/ExecutableMemory.cpp
index 24c83ce..15d5b39 100644
--- a/src/Reactor/ExecutableMemory.cpp
+++ b/src/Reactor/ExecutableMemory.cpp
@@ -247,6 +247,13 @@
 
 		if(mapping == MAP_FAILED)
 		{
+			// Retry without MAP_JIT (for older macOS versions).
+			mapping = mmap(nullptr, length, PROT_READ | PROT_WRITE,
+			               MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+		}
+
+		if(mapping == MAP_FAILED)
+		{
 			mapping = nullptr;
 		}
 	#else