-1005F error when in recovery mode

Thank you a lot for the quick question!

I have logged into out wifi router website to check what protection we have and its set to wpa/wpa2. So i disabled the password protection to try with an unlocked WIFI but sadly it also stays in the "globe logo spinning, wifi chosen but nothing else happens" mode.

Even if i choose another wifi (we have 3 for the house) which is still on wpa protection it'll ask me for the password, i type it in and press enter and it goes back to the previously described state.

Oddly enough it doesnt jump to -1005F error now, or maybe it will in a few minutes.

But i had 1005F and 2002F errors coming up while trying the recover via wifi.

Luckily we have enough other macs to try the bootable installer but im always a bit nervous when i need to use terminal and dont want to mess up my other device.

However it seems like the only option.

I'll also post a separate question regarding migration assistant as this was the original problem that led us to clean a brand new mac - the mail app wouldnt work on the new mac after migrating from the backup disk. But thats a separate thing.

Oh ok, by now -2002F showed up.

Hi!

Thank you for the message!

I followed the instructions - downloaded sierra installer (which took a few hours (5GB)) and then copied and above indicated. Everything went fine, it was "Done." However now that i plugged it into the patient and held option key as indicated on the apple support site and then chose the disk it came up with the "Prohibitory symbol" .. guess the whole thing is really cursed ... any idea why it might have done so or what the solution could be?

UPDATE:

Before trying any new method i thought to give it a shot and download it onto the usb key once more and try. So i did exactly the same thing than before (everything exactly the same).

Did the option hold, choose disk (and i thought got nothing to loose lets choose also the wifi network and type in the password again). Then left it to load up the apple logo like before and when returning expecting the prohibition symbol there was the welcome screen for sierra!

It bugs be that i dont know why it worked this time and not the time before cause it was exactly the same procedure and apple support doesnt say anything about setting up the wifi too cause the point is that it couldnt do it via wifi in the first place.