MBP 2011 / 10.6.7: Not booting from external devices

Hi everybody,
I just bought a brand new MBP 2.3 GHz i7 QC, 8 GB RAM, 500 GB HDD/7.200. After updating to 10.6.7, installing my applications and restoring my libraries and documents, I made a complete backup of Macintosh HD on an external USB HDD using Carbon Copy Cloner.
Unfortunately, the generated clone won't boot, although the parameters of the external HDD are correct (GUID etc.). The boot process hangs at the white Apple logo display and won't continue. Additionally, I tried to start the system from TechTool Pro's and Drive Genius' original boot DVDs - they won't work either. Same for TechTool Pro's eDisk feature.
At last, ProSoft (maker of Drive Genius) support said that some kind of Apple development kit needs to be updated before they can provide a bootable DVD for 10.6.7. Nevertheless, why is the external HDD not working? It has been formatted using 10.6.7, so it should be recognized as a proper external boot device.
Any ideas? Any help is appreciated.
Message was edited by: SteffenKaiser

I can surely boot from Apple's OS X installation DVD. No problem. Hardware Test runs through smoothly. Eventually, I made the Carbon Copy Cloner image on the external HDD boot. That's sufficient for now, although I wonder why the DVDs (made with 10.6.4) won't work.

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Quote from: Henry on 03-September-08, 14:26:24
Are you saying it does work but you simply can't boot from it? Have you tried by using the F11 boot menu?
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This question was solved.
View Solution.

Hi,
You'll have to disable secure boot and then enable legacy mode in BIOS....
These instructions should help:
Cannot Start Notebook Computer From a Bootable CD or DVD
Secure Boot (Windows 8)
Note:
If you have HP Support Assistant installed on the computer(The Blue Question Mark) then open it ==> Complete all pending Updates & Tuneups==> Restart and Check. It may solve your problem
Although I am an HP employee, I am speaking for myself and not for HP.
**Click on “Kudos” Star if you think this reply helped** Or Mark it as "Solved" if issue got fixed.

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Hello everyone,
I have a new 2TB WD EARS drive which I have Snow Leopard installed on. It was cloned from my 1TB WD drive which was running Snow Leopard perfectly beforehand. I have the 2TB HDD installed in a firewire400/800/USB/eSata enclosure and I cannot boot up from the HDD. It is GUID Partitioned as you can see from the Info below:
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Journaled isn't a requirement for SL to boot. All I can suggest for the OP is to erase and repartition the HD; then, try again.

MBP 2011 / 10.6.7: Not booting from external devices

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