Currently, there are no power management options for wireless cards in Apple computers. However, the Interference Robustness feature found under the wireless menu toggles between two modes of wireless behaviors to enhance wireless stability and performance. When enabled, the MacBook's wireless card attempts to send many pieces of small information to combat high wireless interference. This increases stability in unreliable wireless environments. When disabled (by default), the wireless card sends bigger pieces of information at a normal rate. This allows faster wireless experience in stable wireless environments.
It is important to note that because enabling Interference Robustness slows down your wireless connection, you should only enable it if you are in an area in which you are experiencing a lot of interference. This feature should be left disabled by default.Tags: Mac OS X, UTORcwn