Recommended setting for your router and access points Wi-Fi
Wi-Fi router settings (or Wi-Fi transmitter) may be used for all Mac and iOS devices.
These settings will produce performance, safety, and best reliability if you use Wi-Fi.
WMM (Wi-Fi Multimedia)
WMM prioritizes network traffic is based on four access categories of: voice, video, best efforts, and backgrounds.
Setting to : Active
All 802.11n and 802.11ac access point WMM must be enabled in the default configurations. You must Disable WMM can cause mmasalah across the entire network, not just the Apple products on the network.