Mavericks (10.9):

 

1. In Safari app, click on "Preferences" from "Safari" menubar

 

2. Click "Privacy" Tab

 

3. In "Block Cookies and other website data:" click "Never"

 

 

Snow Leopard or earlier (10.8 or earlier):

 

1. In Safari app, click on "Preferences" from "Safari" menubar

 

2. Click on "Privacy" Tab

 

3. In "Block cookies:" to "Never"

 

 

iPad (iOS7):

 

1. Click "Settings" from Home Screen

 

2. Click on "Safari" in the Settings on left side

 

3. Click on "Block Cookies"

 

4. Click "Never"