Hello !
Little update...
Just bought the Tp-link TL-WN823N v.3, 300Mbps Mini.
I installed the Mac drivers from the Tp-link website, in beta version (released on the 2018-04-28). Works like a charm, either on Usb 2 ou 3 port, on High Sierra 10.13.4.
Hope this will be usefull to other people...