The mailing list for users of the eduroam Configuration Assistant Tool (CAT)

[Alan Buxey <alan.buxey AT gmail.com>]

hi,

there is a standard name 'eduroam'  :)

OSX should use 5GHz by default - so long as there are certain prerequisites met - see here: https://support.apple.com/en-gb/HT206207

WiFi is pretty much a client democracy - the client chooses the BSSID that it connects to (the AP) and how long it sticks to that AP...and also what channel it uses. 

If the client is using 2.4GHz rather than 5GHz then it can be persuaded to move - if the vendor has some 'band steering' methods, or the client supports 802.11r

or 802.11k - you can even adjust the xmit power - turn down the 2.4GHz maybe even turn it off on some AP groups etc 

but you may actually make wireless worse - 5GHz doesn't propagate as far, is easily blocked and any promises of all that bandwidth soon turn

to sadness as you realise how many of those 5GHz channels cannot be used due to regulations, how many of them go offline throughout the day due to DFS etc

how few there are when the promised land of 80MHz width proves itself unobtainable in most environments, how many just cannot be connected to

because your Mac saw a beacon for some other 3rd party AP before it saw one of your APs beacons and now thinks its in the US region....  ;-)

alan