How to Delete a Wifi Network Profile - Mac OSX
Please use these steps only if you are comfortable performing them and ONLY if you know the exact purpose for which you would delete a wifi profile.
1. Locate and click on the Wifi Networks icon / Airport located in the upper right corner of the task bar.
2. Click on Open Network Preferences.
3. Click on Wifi in the left hand pane.
4. Click on Advanced in the lower right corner.
5. Click on the desired network.
6. Click on the - icon to remove the wifi network.
MacBook Air (13-inch Mid 2013), OS X Mavericks (10.9.1)