#ifdef SG_HAVE_STD_INCLUDES
# include <istream>
-#elif defined( SG_HAVE_NATIVE_SGI_COMPILERS )
-# include <iostream.h>
-#elif defined( __BORLANDC__ )
+#elif defined( __BORLANDC__ ) || (__APPLE__)
# include <iostream>
#else
# include <istream.h>
#endif
-#if ! defined( SG_HAVE_NATIVE_SGI_COMPILERS )
SG_USING_STD(istream);
-#endif
#include STL_STRING
SG_USING_STD(string);