Macbook with 2 MyPassport Ultra connected won’t boot

WD External and Portable SSD Portable SSD
1

Hi there,

I have a Macbook Pro (running on El Capitan) with two WD My Passport Ultra (2TB). They are connected via a powered USB3 hub where I also plugged in my Wacom Intuos tablet.

When I want to boot my Macbook with the hub connected, the Macbook will fire up but won’t show me the login screen. All I can do here is a “hard” switch off.
I have to disconnect the hub, hit the power button, wait for the login screen and then I can connect the hub to get everything working. It works fine then but this can’t be a solution.

Any hints?

Best regards,
Johannes

2

Hi jonnestorius,

Do you face the same issue while the drive is connected directly to the computer not to the hub?

3

Hi Alex,
thanks for your reply. I’d say that the issue is gone—I just connected both drives directly to the computer. It booted but slower than normal.

4

Seems that I just solved the problem. The hub was powered with a 0.45A power supply. Maybe that was underpowered. The hub is now powered with 2500mA—no booting issues so far.

5

Okay, the problem is not solved with a more powerful supply. The macbook still won’t boot with the external drives attached via the USB3 hub.