diff --git a/window-copy.c b/window-copy.c
index b49be33..9537ad5 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -23,6 +23,7 @@

 #include "tmux.h"

+void to_pasteboard(char *buf);
 struct screen *window_copy_init(struct window_pane *);
 void	window_copy_free(struct window_pane *);
 void	window_copy_resize(struct window_pane *, u_int, u_int);
@@ -143,6 +144,18 @@ struct window_copy_mode_data {
 	char		jumpchar;
 };

+
+void to_pasteboard(char *buf)
+{
+    /* Copy to pasteboard */
+    FILE *fp;
+    fp = fopen("/tmp/tmux-buffer", "w");
+    fprintf(fp, "%s\0", buf);
+    fclose(fp);
+    system("reattach-to-user-namespace -l zsh -c \"pbcopy < /tmp/tmux-buffer\"");
+}
+
+
 struct screen *
 window_copy_init(struct window_pane *wp)
 {
@@ -1349,6 +1362,9 @@ window_copy_copy_selection(struct window_pane *wp)
 	/* Add the buffer to the stack. */
 	limit = options_get_number(&global_options, "buffer-limit");
 	paste_add(&global_buffers, buf, off, limit);
+
+    /* add by yusukei */
+    to_pasteboard(buf);
 }

 void
@@ -1406,6 +1422,9 @@ window_copy_copy_line(struct window_pane *wp,
 		*buf = xrealloc(*buf, 1, (*off) + 1);
 		(*buf)[(*off)++] = '\n';
 	}
+
+    /* add by yusukei */
+    to_pasteboard(buf);
 }

 void