HP LaserJet 9000 Printer series - Manual (Page 30)

30 2 Finisher tasks ENWW
Macintosh
1 Click File and then click Print.
2 In the pop-up menu, select Output Options.
3 On the drop-down menu, select Stapler Option.
Mac OS X
1 Click File and then click Print.
2 On the pop-up menu, select Finishing. On the drop-down menu,
select the Stapler Option.