A number of sources state that to pass 802.11ac compliance the device must support PMF ( Protected Management Frames). Thus I believe any apple device that is labeled as 802.11ac, must support 802.11w. That said 802.11n devices probably do not support PMF.
See below References:
In 2009, the 802.11 working group ratified 802.11w, a standard for the protection of management frames. Unicast management frames are protected with CCMP and encrypted to prevent eavesdropping, while broadcast management frames are authenticated with the Broadcast/Multicast Integrity Protocol (BIP). (http://chimera.labs.oreilly.com/books/1234000001739/ch05.html#security_id2)
The IEEE 802.11w amendment added this functionality to the 802.11 standard and since July 1st 2014, the Wi-Fi Alliance (WFA) made the support of Protected Management Frames (PMF) mandatory to pass 802.11ac or Passpoint aka HotSpot2.0 R2 interoperability certification. (https://wlan1nde.wordpress.com/2014/10/21/protected-management-frames-802-11w/)
See Also: https://framebyframewifi.net/2016/08/02/802-11ac-encryption-upgrade/
The general consensus is if you have an 802.11n device it probably wont support PMF, if you have an 802.11ac device is should support PMF.