@ellesappelle i found solution here: http://forum.tp-link.com/showthread.php?100901-ASAP-Passwords-and-wifi-not-working-on-mac there is a beta firmware link that worked for me finally and all my OSX...

Hi, I'm also looking for some rescue for a brand new TL-WA850RE EU Ver 4.0 that doesnt work with MacOS, and got "bad password" issue.. I installed some 850rev4-up-ver1-0-0-P1[20171116-rel36232] that...