diff --git a/lldb/include/lldb/Host/macosx/HostThreadMacOSX.h b/lldb/include/lldb/Host/macosx/HostThreadMacOSX.h
index 4e41119d97c6a..0299be3874085 100644
--- a/lldb/include/lldb/Host/macosx/HostThreadMacOSX.h
+++ b/lldb/include/lldb/Host/macosx/HostThreadMacOSX.h
@@ -17,8 +17,7 @@ class HostThreadMacOSX : public HostThreadPosix {
   friend class ThreadLauncher;
 
 public:
-  HostThreadMacOSX();
-  HostThreadMacOSX(lldb::thread_t thread);
+  using HostThreadPosix::HostThreadPosix;
 
 protected:
   static lldb::thread_result_t ThreadCreateTrampoline(lldb::thread_arg_t arg);
diff --git a/lldb/source/Host/macosx/objcxx/HostThreadMacOSX.mm b/lldb/source/Host/macosx/objcxx/HostThreadMacOSX.mm
index 4f7e7ab248ad6..b24fe187b1a55 100644
--- a/lldb/source/Host/macosx/objcxx/HostThreadMacOSX.mm
+++ b/lldb/source/Host/macosx/objcxx/HostThreadMacOSX.mm
@@ -7,62 +7,14 @@
 //===----------------------------------------------------------------------===//
 
 #include "lldb/Host/macosx/HostThreadMacOSX.h"
-#include "lldb/Host/Host.h"
-
 #include <CoreFoundation/CoreFoundation.h>
 #include <Foundation/Foundation.h>
 
-#include <pthread.h>
-
 using namespace lldb_private;
 
-
-static pthread_once_t g_thread_create_once = PTHREAD_ONCE_INIT;
-static pthread_key_t g_thread_create_key = 0;
-
-namespace {
-class MacOSXDarwinThread {
-public:
-  MacOSXDarwinThread() { m_pool = [[NSAutoreleasePool alloc] init]; }
-
-  ~MacOSXDarwinThread() {
-    if (m_pool) {
-      [m_pool drain];
-      m_pool = nil;
-    }
-  }
-
-  static void PThreadDestructor(void *v) {
-    if (v)
-      delete static_cast<MacOSXDarwinThread *>(v);
-    ::pthread_setspecific(g_thread_create_key, NULL);
-  }
-
-protected:
-  NSAutoreleasePool *m_pool = nil;
-
-private:
-  MacOSXDarwinThread(const MacOSXDarwinThread &) = delete;
-  const MacOSXDarwinThread &operator=(const MacOSXDarwinThread &) = delete;
-};
-} // namespace
-
-static void InitThreadCreated() {
-  ::pthread_key_create(&g_thread_create_key,
-                       MacOSXDarwinThread::PThreadDestructor);
-}
-
-HostThreadMacOSX::HostThreadMacOSX() : HostThreadPosix() {}
-
-HostThreadMacOSX::HostThreadMacOSX(lldb::thread_t thread)
-    : HostThreadPosix(thread) {}
-
 lldb::thread_result_t
 HostThreadMacOSX::ThreadCreateTrampoline(lldb::thread_arg_t arg) {
-  ::pthread_once(&g_thread_create_once, InitThreadCreated);
-  if (g_thread_create_key) {
-    ::pthread_setspecific(g_thread_create_key, new MacOSXDarwinThread());
+  @autoreleasepool {
+    return HostThreadPosix::ThreadCreateTrampoline(arg);
   }
-
-  return HostThreadPosix::ThreadCreateTrampoline(arg);
 }