Mac Mini won't boot with USB Drive connected

Posted by Jens on Super User See other posts from Super User or by Jens
Published on 2012-06-19T14:11:15Z Indexed on 2012/06/19 15:18 UTC
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usb

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Newbie here.

I have a 2012 MacMini with 2 x 3Tb Seagate GoFlex Desk external hard drives. Both drives have their own power supplies and work perfectly.

I use both MacOS and Windows7 on the Mac for different reasons. Both boot and work fine.

The only problem is neither MacOS or Windows will boot while the two USB drives are connected. I must disconnect the USB cables, boot and reconnect them. Then all works fine.

Its rather annoying since this is mostly a Media Centre and you really don't want to be playing with cables every day, and I don't leave my stuff on over night.

Can anyone help?

Thanks Jens

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