Points to follow;
1. Keep ure OSX updated for all general compatability and security issues.
2.To print on both sides of the page manually
- Load paper into the paper tray.
- From the File menu in the software application, select Print .
- Make sure that HP is the selected printer.
- From the pop-up menu, select Paper Handling .
- Select the Odd Numbered Pages check box.
- Change any other desired print settings, then click Print .
- Wait until all the odd-numbered pages are printed before removing any of the printed pages from the output tray.
- From the FIle menu , select Print
- From the pop-up menu, select Paper Handling .
- Select the Even Numbered Pages check box.
- Click Print .