Summary:

1. Find the AP: --------------------airmon-ng & airodump-ng

2. Find an associated client: -----airodump-ng

3. "Borrow" the MAC address: ---macchanger 

Details:

1. Find the AP: --------------------airmon-ng & airodump-ng

On monitoring machine: 

On testing machine: 

Before joining a new AP - 

Assign a essid to wireless interface, note you need to bring down the wireless interface before assigning a essid to a wireless interface -

Note after the change, you're not associated with the AP because there is a mac filter on the AP