Change MAC address in Yosemite To change the MAC address I use the common

sudo /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -z
sudo ifconfig en0 ether xx:xx:xx:xx:xx:xx
networksetup -detectnewhardware


It shows the changed MAC address when I run

ifconfig en0 |grep ether


Is this sufficient or should the changed address also appear in System Preferences -> Network and in the extended Wi-Fi details sub menu (alt+click on Wi-Fi symbol)? In both places the original MAC address is still shown although Terminal gives a different address.
This should be sufficient. After changing the MAC address this way you could use e.g. Wireshark to capture the network traffic. The new MAC address should be shown there. At least this works on my macbook.