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Changed HDD from old Mac to new. Machine ID?

So i shifted from an old macbook pro 15" to a macbook to still be able to work. I took the hdd from the pro and put it in the macbook. Now my question is, will the machine id or the mac address change?? Just... wondering. because i've got a lot of wifi routers already saved and getting the passwords to a few of them is going to be a pain in the wrong place. Thank you!

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The machine ID will change. You shouldn't have a problem with the passwords unless you change the computers name. Even when I clone a drive, the new machine will see the old machine if it is on and automatically rename it.

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Hey mayer. Thank you for your answer. For further clarification, will the machine ID change to the new machine or will the old one remain? Thanks again!

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When I've done this with 10.7 the computers name has remained the same.

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Aryan Sharma will be eternally grateful.
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