+#ifdef __WXMAC__
+ int major,minor;
+ wxGetOsVersion( &major, &minor );
+
+ if (style & wxTR_HAS_BUTTONS) style |= wxTR_MAC_BUTTONS;
+ if (style & wxTR_HAS_BUTTONS) style &= ~wxTR_HAS_BUTTONS;
+ style &= ~wxTR_LINES_AT_ROOT;
+ style |= wxTR_NO_LINES;
+ if (major < 10)
+ style |= wxTR_ROW_LINES;
+ if (major >= 10)
+ style |= wxTR_AQUA_BUTTONS;
+#endif
+
+