SH-2908 Fix for mac build

indra/llrender/llgl.cpp

@@ -561,6 +561,15 @@ bool LLGLManager::initGL()
 	if (mGLVersion >= 2.f)
 	{
 		parse_glsl_version(mGLSLVersionMajor, mGLSLVersionMinor);
+
+#if LL_DARWIN
+		//never use GLSL greater than 1.20 on OSX
+		if (mGLSLVersionMajor > 1 || mGLSLVersionMinor >= 30)
+		{
+			mGLSLVersionMajor = 1;
+			mGLSLVersionMinor = 20;
+		}
+#endif
 	}
 
 	// Trailing space necessary to keep "nVidia Corpor_ati_on" cards

indra/llrender/llvertexbuffer.cpp

@@ -1264,11 +1264,13 @@ void LLVertexBuffer::setupVertexArray()
 
 			if (attrib_integer)
 			{
+#if !LL_DARWIN
 				//glVertexattribIPointer requires GLSL 1.30 or later
 				if (gGLManager.mGLSLVersionMajor > 1 || gGLManager.mGLSLVersionMinor >= 30)
 				{
 					glVertexAttribIPointer(i, attrib_size[i], attrib_type[i], sTypeSize[i], (void*) mOffsets[i]); 
 				}
+#endif
 			}
 			else
 			{
@@ -2258,9 +2260,11 @@ void LLVertexBuffer::setupVertexBuffer(U32 data_mask)
 		if (data_mask & MAP_TEXTURE_INDEX && 
 				(gGLManager.mGLSLVersionMajor >= 2 || gGLManager.mGLSLVersionMinor >= 30)) //indexed texture rendering requires GLSL 1.30 or later
 		{
+#if !LL_DARWIN
 			S32 loc = TYPE_TEXTURE_INDEX;
 			void *ptr = (void*) (base + mOffsets[TYPE_VERTEX] + 12);
 			glVertexAttribIPointer(loc, 4, GL_UNSIGNED_BYTE, LLVertexBuffer::sTypeSize[TYPE_VERTEX], ptr);
+#endif
 		}
 		if (data_mask & MAP_VERTEX)
 		{