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I've just made a bootable USB stick following this official how-to:

But unfortunately, my Mac doesn't seem to recognise the USB stick. Oddly, the same live USB stick works on my Samsung Netbook...

Thanks in advance for any help.

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I assume by "doesn't recognize", you mean that the USB stick doesn't show up on the list of options to boot from? Some Macs of a certain age and make cannot boot from USB, or may not do it via the "option-startup" method. What type and model of Mac are you using?

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