I can get my Mac to recognize my SamSung phone if the phone is plugged directly into the MAC.
(The phone is already 100 percent charged)
I then connect you DC powered 10 meter USB extension cable to the MAC , and connect the SamSung to the other end of that cable. I use your AC/DC plug to power your cable.
I cannot get the MAC to make a adb connection to the phone, nor does it charge the phone.
Now, perhaps the phone requires too much power, OK. But why can’t I get a data connection at least to the phone, thru your (DC powered) active cable ? thanks