Unable to change the startup disk

Question

Unable to change the startup disk

Hi,

I have created a bootable drive with Carbon Copy Cloner on an external 2TB drive. I wanted to startup from the external drive. So I went in the system preferences, I unlock the padlock and choose the external drive ... then pressed the restart button. Atfer trying a few times, the computer never restarted from the external drive, always from the internal HD.

I have an Intel iMac (late 2013) with a 3TB fusion drive.

What could be the reason for that ?

Regards.

Robert Lespérance

iMac, OS X Yosemite (10.10.2), 3,5 GHz Intel i7 - 3TB FD - 32GB

Posted on Feb 19, 2015 5:22 PM

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Answer 1

braden85

Community Specialist

Feb 21, 2015 8:26 AM in response to Robert Lesperance

Hey Robert Lesperance,

I see that you are trying to make your external hard drive into a bootable drive. Try using the information in the following article to help you accomplish this goal:

OS X: Installing OS X on an external volume - Apple Support

http://support.apple.com/en-us/HT202796

You can then use this article to help you actually select the drive when attempting to boot to it:

How to choose a startup disk on your Mac - Apple Support

http://support.apple.com/en-us/HT1310

Thanks for being a part of the Apple Support Communities!

Regards,

Braden

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Answer 2

Feb 24, 2015 5:10 AM in response to braden85

The problem seems to be with my Anker USB 3.0 hub. The only way to recognize my external drive, was to connect directly to my iMac. Then the startup disk proceeded as supposed.

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Answer 3

braden85

Community Specialist

Feb 24, 2015 7:46 AM in response to Robert Lesperance

Glad you were able to resolve the issue, Robert. Thanks for using the Apple Support Communities. Have a good one!

-Braden

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