Index: lldb/include/lldb/Utility/Log.h
===================================================================
--- lldb/include/lldb/Utility/Log.h
+++ lldb/include/lldb/Utility/Log.h
@@ -95,6 +95,12 @@
   size_t m_total_count = 0;
 };
 
+class SystemLogHandler : public LogHandler {
+public:
+  SystemLogHandler();
+  void Emit(llvm::StringRef message) override;
+};
+
 class Log final {
 public:
   /// The underlying type of all log channel enums. Declare them as:
Index: lldb/source/Utility/Log.cpp
===================================================================
--- lldb/source/Utility/Log.cpp
+++ lldb/source/Utility/Log.cpp
@@ -32,6 +32,12 @@
 #include <unistd.h>
 #endif
 
+#if defined(__APPLE__)
+#include <os/log.h>
+static os_log_t g_os_log;
+static std::once_flag g_os_log_once;
+#endif
+
 using namespace lldb_private;
 
 llvm::ManagedStatic<Log::ChannelMap> Log::g_channel_map;
@@ -384,3 +390,24 @@
   }
   stream.flush();
 }
+
+SystemLogHandler::SystemLogHandler() {
+#if defined(__APPLE__)
+  std::call_once(g_os_log_once, []() {
+    g_os_log = os_log_create("com.apple.dt.lldb", "lldb");
+  });
+#endif
+}
+
+void SystemLogHandler::Emit(llvm::StringRef message) {
+  std::string str(message);
+#if defined(__APPLE__)
+  if (__builtin_available(macos 10.12, iOS 10, tvOS 10, watchOS 3, *)) {
+    os_log(g_os_log, "%{public}s", str.c_str());
+  } else {
+    fprintf(stderr, "%s", str.c_str());
+  }
+#else
+  fprintf(stderr, "%s", str.c_str());
+#endif
+}