diff --git a/code/nel/include/nel/misc/mutex.h b/code/nel/include/nel/misc/mutex.h
index adbc7e7e5..cb7e9a188 100644
--- a/code/nel/include/nel/misc/mutex.h
+++ b/code/nel/include/nel/misc/mutex.h
@@ -28,7 +28,11 @@
 #	endif
 #elif defined(NL_OS_UNIX)
 #	include <pthread.h> // PThread
-#	include <semaphore.h> // PThread POSIX semaphores
+#	ifdef NL_OS_MAC
+#		include <dispatch/dispatch.h>
+#	else
+#		include <semaphore.h> // PThread POSIX semaphores
+#	endif
 #	include <unistd.h>
 #	define __forceinline
 #	ifdef NL_OS_MAC
@@ -532,8 +536,10 @@ private:
 
 #ifdef NL_OS_WINDOWS
 	TNelRtlCriticalSection	_Cs;
-#elif defined NL_OS_UNIX
-	sem_t			_Sem;
+#elif defined(NL_OS_MAC)
+	dispatch_semaphore_t	_Sem;
+#elif defined(NL_OS_UNIX)
+	sem_t					_Sem;
 #else
 #	error "No fair mutex implementation for this OS"
 #endif
diff --git a/code/nel/src/misc/mutex.cpp b/code/nel/src/misc/mutex.cpp
index 3c86e2b29..28f6bae37 100644
--- a/code/nel/src/misc/mutex.cpp
+++ b/code/nel/src/misc/mutex.cpp
@@ -406,13 +406,21 @@ void CUnfairMutex::leave()
  */
 CFairMutex::CFairMutex()
 {
+#ifdef NL_OS_MAC
+	_Sem = dispatch_semaphore_create(1);
+#else
 	sem_init( const_cast<sem_t*>(&_Sem), 0, 1 );
+#endif
 }
 
 
 CFairMutex::CFairMutex(	const std::string &name )
 {
+#ifdef NL_OS_MAC
+	_Sem = dispatch_semaphore_create(1);
+#else
 	sem_init( const_cast<sem_t*>(&_Sem), 0, 1 );
+#endif
 }
 
 
@@ -421,7 +429,11 @@ CFairMutex::CFairMutex(	const std::string &name )
  */
 CFairMutex::~CFairMutex()
 {
+#ifdef NL_OS_MAC
+	dispatch_release(_Sem);
+#else
 	sem_destroy( const_cast<sem_t*>(&_Sem) ); // needs that no thread is waiting on the semaphore
+#endif
 }
 
 
@@ -430,7 +442,11 @@ CFairMutex::~CFairMutex()
  */
 void CFairMutex::enter()
 {
+#ifdef NL_OS_MAC
+	dispatch_semaphore_wait(_Sem, DISPATCH_TIME_FOREVER);
+#else
 	sem_wait( const_cast<sem_t*>(&_Sem) );
+#endif
 }
 
 
@@ -439,7 +455,11 @@ void CFairMutex::enter()
  */
 void CFairMutex::leave()
 {
+#ifdef NL_OS_MAC
+	dispatch_semaphore_signal(_Sem);
+#else
 	sem_post( const_cast<sem_t*>(&_Sem) );
+#endif
 }
 
 
diff --git a/code/ryzom/client/src/hair_set.cpp b/code/ryzom/client/src/hair_set.cpp
index d82733162..5d44e2857 100644
--- a/code/ryzom/client/src/hair_set.cpp
+++ b/code/ryzom/client/src/hair_set.cpp
@@ -45,20 +45,20 @@ void CHairSet::init (NLMISC::IProgressCallback &progress)
 		progress.progress ((float)k/(float)numHairItem);
 
 		const CItemSheet *item = SheetMngr.getItem(SLOTTYPE::HEAD_SLOT, k);
-		if( (item) && (!item->getShape().empty()) )
+		if (item && !item->getShape().empty())
 		{
-			std::string itemName = NLMISC::toLower(item->getShape());
-
 			if (item->getShape().find("cheveux", 0) != std::string::npos)
 			{
 				// get race
-				uint16 race = (uint16) itemName[1] | ((uint16) itemName[0] << 8);
-				switch(race)
+				std::string itemName = NLMISC::toLower(item->getShape());
+
+				// fortunately, first character of each race is distinct
+				switch(itemName[0])
 				{
-					case 'ma': _Hairs[Matis].push_back(k); break;
-					case 'tr': _Hairs[Tryker].push_back(k); break;
-					case 'zo': _Hairs[Zorai].push_back(k); break;
-					case 'fy': _Hairs[Fyros].push_back(k); break;
+					case 'm': _Hairs[Matis].push_back(k); break;
+					case 't': _Hairs[Tryker].push_back(k); break;
+					case 'z': _Hairs[Zorai].push_back(k); break;
+					case 'f': _Hairs[Fyros].push_back(k); break;
 				}
 			}
 		}
diff --git a/code/ryzom/client/src/interface_v3/character_3d.cpp b/code/ryzom/client/src/interface_v3/character_3d.cpp
index c76407f11..f711fb764 100644
--- a/code/ryzom/client/src/interface_v3/character_3d.cpp
+++ b/code/ryzom/client/src/interface_v3/character_3d.cpp
@@ -797,7 +797,7 @@ void CCharacter3D::setup (const SCharacter3DSetup &c3ds)
 		}
 
 		// Instance skin color
-		if (c3ds.People != -1)
+		if (c3ds.People != EGSPD::CPeople::Undefined)
 		if ((c3ds.People != _CurrentSetup.People) || bInstanceRebuilt || bQualityRebuilt)
 		{
 			if (!_Instances[i].empty())
diff --git a/code/ryzom/client/src/interface_v3/dbctrl_sheet.cpp b/code/ryzom/client/src/interface_v3/dbctrl_sheet.cpp
index 91bb94a23..fe7f20e1f 100644
--- a/code/ryzom/client/src/interface_v3/dbctrl_sheet.cpp
+++ b/code/ryzom/client/src/interface_v3/dbctrl_sheet.cpp
@@ -456,7 +456,7 @@ bool CCtrlSheetInfo::parseCtrlInfo(xmlNodePtr cur, CInterfaceGroup * /* parentGr
 			else
 			{
 				// must not have so much brick type, else must change code!
-				nlassert(brickType<32);
+				// nlassert(brickType<32);
 
 				// Ok set the bit associated
 				_BrickTypeBitField|= 1<<brickType;
diff --git a/code/ryzom/common/src/game_share/brick_types.h b/code/ryzom/common/src/game_share/brick_types.h
index fafdb2e4f..871a02cfb 100644
--- a/code/ryzom/common/src/game_share/brick_types.h
+++ b/code/ryzom/common/src/game_share/brick_types.h
@@ -43,7 +43,7 @@ namespace BRICK_TYPE
 		TIMED_ACTION,
 		BRICK_TYPE_COUNT,
 		BONUS,
-		UNKNOWN
+		UNKNOWN // Warning: Shouldn't exceed 32
 	};
 
 
diff --git a/code/ryzom/common/src/game_share/people_pd.h b/code/ryzom/common/src/game_share/people_pd.h
index 379a09378..ffcf8732f 100644
--- a/code/ryzom/common/src/game_share/people_pd.h
+++ b/code/ryzom/common/src/game_share/people_pd.h
@@ -51,6 +51,7 @@ public:
 
 	enum TPeople
 	{
+		Undefined = -1,
 		Humanoid = 0,
 		Playable = 0,
 		Fyros = 0,