If you are experiencing dropped wi-fi on Mavericks this fix should help
- Open System Preferences
- Select Network
- Select Wifi from left side menu
- Select Advanced
- Click in Preferred Networks, press CMD+A to select all
- Select the '-' button
- Select OK
- Back in the Network window select the Location pull down menu
- Select Edit Locations...
- Select '+'
- Add a location name of your choice
- Select Done
- Back in the Network window choose the Network Name you wish to join
- Select Apply
Your Mac should now connect back to your wifi and - hopefully - you should now have fixed the dropped wifi issue.
