diff --git a/lib/defines.h b/lib/defines.h
index 5da8a135..55ba3a17 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -46,9 +46,9 @@ static const char * DBG_LVL_LIST[] = {"NONE", "FAIL", "ERROR", "WARN", "INFO", "
 #endif
 #else
 #if DEBUG >= DLVL_DEVEL
-#define DEBUG_MSG(lvl, msg, ...) if (Util::Config::printDebugLevel >= lvl){fprintf(stderr, "%s||%d|%s:%d|%s|" msg "\n", DBG_LVL_LIST[lvl], getpid(), __FILE__, __LINE__, Util::Config::streamName.c_str(), ##__VA_ARGS__);}
+#define DEBUG_MSG(lvl, msg, ...) if (Util::Config::printDebugLevel >= lvl){fprintf(stderr, "%s|MistProcess|%d|%s:%d|%s|" msg "\n", DBG_LVL_LIST[lvl], getpid(), __FILE__, __LINE__, Util::Config::streamName.c_str(), ##__VA_ARGS__);}
 #else
-#define DEBUG_MSG(lvl, msg, ...) if (Util::Config::printDebugLevel >= lvl){fprintf(stderr, "%s||%d||%s|" msg "\n", DBG_LVL_LIST[lvl], getpid(), Util::Config::streamName.c_str(), ##__VA_ARGS__);}
+#define DEBUG_MSG(lvl, msg, ...) if (Util::Config::printDebugLevel >= lvl){fprintf(stderr, "%s|MistProcess|%d||%s|" msg "\n", DBG_LVL_LIST[lvl], getpid(), Util::Config::streamName.c_str(), ##__VA_ARGS__);}
 #endif
 #endif
 
diff --git a/lib/shared_memory.cpp b/lib/shared_memory.cpp
index 0e8b690b..b6b2cf9c 100644
--- a/lib/shared_memory.cpp
+++ b/lib/shared_memory.cpp
@@ -122,6 +122,14 @@ namespace IPC {
 #else
       if (oflag & O_CREAT) {
         mySem = sem_open(name, oflag, mode, value);
+#if defined(__APPLE__)
+        if (!(*this)){
+          if (sem_unlink(name) == 0){
+            INFO_MSG("Deleted in-use semaphore: %s", name);
+            mySem = sem_open(name, oflag, mode, value);
+          }
+        }
+#endif
       } else {
         mySem = sem_open(name, oflag);
       }
diff --git a/lib/stream.cpp b/lib/stream.cpp
index f9820db8..24264fb2 100644
--- a/lib/stream.cpp
+++ b/lib/stream.cpp
@@ -230,7 +230,7 @@ DTSC::Meta Util::getStreamMeta(const std::string &streamname){
 bool Util::streamAlive(std::string &streamname){
   char semName[NAME_BUFFER_SIZE];
   snprintf(semName, NAME_BUFFER_SIZE, SEM_INPUT, streamname.c_str());
-  IPC::semaphore playerLock(semName, O_RDWR, ACCESSPERMS, 1, true);
+  IPC::semaphore playerLock(semName, O_RDWR, ACCESSPERMS, 0, true);
   if (!playerLock){return false;}
   if (!playerLock.tryWait()){
     playerLock.close();