What's the earliest model of the MacBook to support Wi-Fi networks over 5GHz?

As the title suggests - what's the earliest model of the MacBook (both Pro/Air preferred if possible) to support Wi-Fi networks over the 5GHz band?

All MacBook models have shipped with support for 5GHz Wi-Fi networks since their first generation.

802.11a

• MacBook (2006)
• MacBook Pro (2006)

802.11n (including draft-n)

• MacBook (Late 2006 thru Mid 2010)
• MacBook Air (2008 thru Mid 2012)
• MacBook Pro (Late 2006 thru Early 2013)

802.11ac

• MacBook (Early 2015 thru Mid 2017)
• MacBook Air (Mid 2013 thru Current)
• MacBook Pro (Late 2013 thru Current)

802.11ax

• (None yet)

Reference: https://everymac.com/systems/by_capability/macs-with-airport-airport-extreme.html