@pipecolicacid17 Hi, Good Day! TP-Link has provided an Installation Guide in the driver files. Please follow the installation guide to install it. Or download from here:...

@SrLan For all who would have the same issue, please refer to the following suggestions: update the driver to be the following one: https://static.tp-link.com/2019/201911/20191128/Archer...

Thank you for your time and patience. Did the speed get much better after changing the new router?

@slipd Sorry for the delay. You could try to use this driver to have a check: https://static.tp-link.com/2020/202006/20200601/00015960-RTLWlanU_WindowsDriver_1030.38.0712.2019_Drv_3.00.0032.L.zip...

@chaslaw Here you go: Archer T2U Nano(UN)_V1_200105_Mac10.15 https://static.tp-link.com/2020/202001/20200113/Archer%20T2U_Plus_Nano_200105_Mac10.15.zip

@KrayMac Good day. Thank you very much for your kind reply. In this way, I am afraid that there might be something wrong about the adapter and please try to contact the shop retailer to get it...