Apple has released an update for recently released Mac systems that improves compatibility when using 5GHz Wi-Fi frequencies. The update is recommended for all "late 2012" Macs. Mac Wi-Fi Update 1.0 ...

Apple just released Mac Wi-Fi Update 1.0. The 1.49MB update, recommended for all late 2012 Mac systems, according to the folks in Cupertino, improves the compatibility when using the 5GHz band Wi-Fi.