HT5219 Is there anyway to update a non-thunderbolt mac book air (please, don't say buying a new one) to work with a thunderbolt to ethernet adapter?

I have a late 2010 Macbook Air with Mountain Lion OS, and after buying a Thuderbolt to Gigabit Ethernet Adapter I realize that my Macbook doesn't have a Thunderbolt port!!!! (lame, isn't it??).
Is there anyway to update my Macbook Air so I can get to use the Thunderbolt-Ethernet Adapter???
Thank you in advance for any help anyone can provide!!!!!

From what you describe, this is normal (ie. correct) behaviour...
In a dark environment, you don't need the lighting to be as bright, because youre eyes are adjusted to the darkness, and there's less ambient light. In a lighter environment, you need more light from the keys and the screen to get the same effect.
The important thing isn't "how many bars of brightness is it set to" but "can I read the key caps and see the screen". If the answer to that question is "yes" than the automatic light adjustment is doing it's job - if it's too bright or too dim them just adjust it accordingly and then leave it on automatic.

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