 On January 7, 2003, Apple introduced AirPort Extreme, based on the 802.11g specification, using Broadcom's BCM4306/BCM2050 two-chip solution.AirPort Extreme allows theoretical peak data transfer rates of up to 54 Mbit/s, and is fully backward-compatible with existing 802.11b wireless network cards and base stations.Several of Apple's desktop computers and portable computers, including the MacBook Pro, MacBook, Mac Mini, and iMac shipped with an AirPort Extreme (802.11g) card as standard.