Checking if your Mac computer has the 5 GHz network band capability
If your Mac computer has an 802.11a or 802.11n wireless network adapter, then it becomes 5 GHz network band capable.
To identify Linksys dual-band routers and devices that support both 2.4 GHz and 5 GHz bands, click here. For instructions on checking if your Windows computer is compatible with the 5 GHz frequency, click here.
This article will guide you in checking whether the wireless adapter of your Mac computer has the 5 GHz network band capability.
Click the Apple icon.
Select About this Mac.
Click the More Info… button.
Select Airport and then check Supported PHY Modes.
In this example, the Supported PHY Modes indicate that the Mac computer supports 802.11a/b/g/n wireless standards. This means that the computer has the 5 GHz network band capability.