Default [Q] Glass Stuck in "Glass is Updating" Boot Loop

Hi!

Glass was working well and one day, I start the glass as usual and they are stucked in a "glass is updating" loop, forever..
I have wait a whole night letting them charging but nothing happend.

So I had a look on this thread and tried to flash XE12 factory image but I can't see my device with adb, neither with fastboot devices command with a manual fastboot start (camera+power button).
My problem is a bit different as the one in the thread above because I didn't try anything special before being stucked in this "updating loop".

I don't know what is my version of glass (XE12, XE16, etc...), I can't set the debug mode because of that infinite loop, and I don't know either if manual fastboot works well or not.

I'm on mac, get the adb and fastboot via google glass sdk after updating it and I have followed the factory reset process provided by google but I can't see my device as I said.

Does anybody have an idea about what could be wrong / what could I've done wrong?