diff --git a/src/base/system.cpp b/src/base/system.cpp
index 2859ab07f..b244163f9 100644
--- a/src/base/system.cpp
+++ b/src/base/system.cpp
@@ -867,10 +867,15 @@ void sphore_destroy(SEMAPHORE *sem)
 #elif defined(CONF_PLATFORM_MACOS)
 void sphore_init(SEMAPHORE *sem)
 {
-	char aBuf[32];
-	str_format(aBuf, sizeof(aBuf), "%p", (void *)sem);
+	char aBuf[64];
+	str_format(aBuf, sizeof(aBuf), "/%d.%p", pid(), (void *)sem);
 	*sem = sem_open(aBuf, O_CREAT | O_EXCL, S_IRWXU | S_IRWXG, 0);
-	dbg_assert(*sem != SEM_FAILED, "sem_open failure");
+	if(*sem == SEM_FAILED)
+	{
+		char aError[128];
+		str_format(aError, sizeof(aError), "sem_open failure, errno=%d, name='%s'", errno, aBuf);
+		dbg_assert(false, aError);
+	}
 }
 void sphore_wait(SEMAPHORE *sem)
 {
@@ -888,8 +893,8 @@ void sphore_signal(SEMAPHORE *sem)
 void sphore_destroy(SEMAPHORE *sem)
 {
 	dbg_assert(sem_close(*sem) == 0, "sem_close failure");
-	char aBuf[32];
-	str_format(aBuf, sizeof(aBuf), "%p", (void *)sem);
+	char aBuf[64];
+	str_format(aBuf, sizeof(aBuf), "/%d.%p", pid(), (void *)sem);
 	dbg_assert(sem_unlink(aBuf) == 0, "sem_unlink failure");
 }
 #elif defined(CONF_FAMILY_UNIX)