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HT1366: MacBook: How to find the serial number

Learn about MacBook: How to find the serial number

HT1366 On Apple Support - I put in my serial number, but it says it's not valid. Now what?

390 Views 1 Reply Latest reply: Jul 30, 2012 1:37 PM by BGreg RSS
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Jul 30, 2012 12:00 PM

I want to upgrade to Mountain Lion. I have 10.5.8 OS X now. The Software Update says there are no updates.But I need to update to the next level in order to be able to download Mountain Lion.

So I go to Apple Support - they ask for my serial number - i type it in - it says "invalid".


So now what? I'm stuck and Apple Support won't talk to me without the serial number.




  • BGreg Level 6 Level 6 (17,500 points)

    There has never been a free upgrade from 10.5 to 10.6 Snow Leopard, so Software Update is reporting the correct information. Snow Leopard was a $30 upgrade, which you may be able to still get by calling Apple, in the US, at 1-800-MY-APPLE. Ask if it's still available from the legacy products list. Since Mountain Lion was released, it's been pulled off the Apple online store site. Or check Amazon or


    You may also want to read this article on the the upgrade from Leopard.


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