I plug the micro SD into my MacBook. I then save a correct
/Volumes/boot/wpa_supplicant.conf with file permissions with 777 (default when creating files into the FAT partition). Then, when I move back the micro SD into the Pi and I boot, the file gets copied to
/etc/wpa_supplicant/wpa_supplicant.conf but with a
600 file permission, when originally it was
644. That way, when the Pi boots, I cannot SSH from outside. So I am stuck. I cannot specify network and connect to it without a keyboard and a monitor....
I am using raspbian stretch on a Pi Zero W.
Any workaround or ideas?