Enabling Pop-ups in Safari

1. From the Safari menu, choose Preferences... and click the Security tab
2. Ensure the Block pop-up windows option is not checked. Unchecking this option will allow pop-ups
3. To block pop-ups once again, check the Block pop-up windows checkbox.

(Note: Safari doesn’t allow you to block pop-ups on a per site basis, pop-ups are either ‘on’ or ‘off’)