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Previously support for the latest high-speed standard could only be enabled via a £1.25 software update. The small charge was necessary to comply with US accounting laws.

Several Mac models have 802.11n hardware support, including Core 2 Duo MacBooks, MacBook Pros and iMacs, as well as the Mac Pro with AirPort Extreme. The How to tell if 802.11n-enabling software is installed support article explains how to fin out if Leopard has enabled this capability.

The latest 802.11n Wi-Fi standard employs MIMO (multiple-input multiple-output) technology that uses multiple antennae to allow for increased data throughput. It has a greater range than 802.11g - around 50m as opposed to 30m and a higher speed - between 100Mbps and 200Mbps compared to 54Mbps. The newest AirPort Extreme Base Station supports 802.11n, as do many third-party routers.