@xReina With the best hardware, WiFi 5 router will deliver up to 500-650Mbps. It appears Tenda mesh hardware is on a budget side and can't deliver that much. Even if Main mesh unit does just 360Mbps,...

@y0u Using Connection Preference feature, configure MacBook Air to only use 5GHz band, by changing its Preferred Band setting from Auto to 5GHz in Deco app. This should convince MacBook connect to...

@y0u What is the firmware version of your X20s? If you please share Update Deco screenshot from Deco app, it'll tell me that info. Example:

Cocolo wrote is there a different way of setting up the x50 as compared to other deco's? @Cocolo It should not be. If there is X55 model in the available options, choose it instead, and if not -...

@xReina These speeds are not good. Your Tenda mesh is WiFi5. Main node should deliver 500-650Mbps, other nodes half of that: 250-300Mbps. PC connected by LAN should get over 300Mbps if everything is...

@xReina I am not from TP-Link Support, just WiFi mesh user with good understanding of technology. As such, I won't be driving you in the direction of Deco mesh. I prefer to troubleshoot things with...