Hi, I
may have a definitive answer to getting the A6200 up and working, but if you subscribe to Murphy being an optimist, then … maybe not?
If you have bought another dongle in the meantime, and are in business, well and good, but if you still have the Netgear, this may be useful.
https://wikidevi.com/wiki/Netgear_A6200_v2
… appears to confirm that the A6200 is catered to by Realtek RTL8812AU driver.
Then there is this page from Diederik De Haas
https://github.com/diederikdehaas/rtl8812AU
… which tells how to install using dkms (Dynamic Kernel Module Support framework) - dkms should be already installed on your Linux, it is on my Sylvia MATE. If not, apt-get install it.
Diederik also has a page here
https://github.com/diederikdehaas/rtl8814AU
… which on first sight appears to be the same, but is not.
The difference between them is one is 2 years old, the other one year old.
Both appear to relate to the same driver, but the first has support for kernels >= 4.7, the newer one 4.8.
You and I are using newer kernels, but that is not to say this will not work.
When you follow the install instructions, use
sudo su
to become Root, then copy and paste the commands less the hash which stands for Root.
When you finish, Exit to leave Root, then Exit to close Terminal.
Good luck and let us know how you go.
Wizard