"As a wireless client roams in an area covered by Meraki APs advertising the same SSID, it will try and associate to the AP that provides the strongest signal. The wireless adapter on the client device measures the RSSI on received frames sent by APs in order to make roaming decisions" the clients with this behaviour are only macbooks? look into the driver and roaming settings. of the device. are they switching also between radio's or ap's on the same radio(from 5ghz to 5ghz) you can try set higher minimum bandwidth, or lower the ap radio signal?
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