I am in this unusual scenario. I have a Mid 2010 13in MacBook Pro and I am trying to make my family's 15inch Mid 2012 MacBook Pro my new personal laptop. However this 15 inch model has a crappy hard disk drive which is beyond slow and makes the laptop unusable for me. How would I migrate to this 15 inch laptop and use the SSD from the 13 inch one?

What is the most efficient way of going about this?

Right now, I cannot think of any other solution but to use Migration Assistant to transfer data from SSD to the HDD in the 15 inch and then taking out the SSD in the 13 inch MBP and cloning it with the HDD that just got all the data from the 13 inch. I am hoping there is a better way than this.

  • Correct me if I'm wrong: is there any reason not to just pull the SSD out of the 2010 MacBook Pro and put it straight into the 2012 MacBook Pro? Then you don't have to do any data transferring
    – NoahL
    Nov 16, 2016 at 4:34
  • I'm not sure you can do that because the OS configuration-related stuff are likely different between the 13 and 15 inch models.
    – btrballin
    Nov 16, 2016 at 5:01
  • Nope. The OS is configured the same on every Mac computer. Try my solution. Worst case scenario, it doesn't work and you have to try something else
    – NoahL
    Nov 16, 2016 at 5:20
  • @NoahL is right. The days since macOS installed files specific to the Mac hardware are long gone. The operating system, software and data should work fine on your Mid 2012 MacBook Pro. You may want to do an SMC and NVRAM reset afterwards just for good measure, but otherwise you should be fine.
    – Monomeeth
    Nov 16, 2016 at 6:09

1 Answer 1


In the past, I have just swapped the drives in the two machines, and everything just worked fine.

Take the SSD from the 13" MBP and put it in the 15" MBP.

In the unlikely event that there are any problems, you can always swap the drives back.

EDIT: You might want to boot into recovery mode, and do a 'Verify Disk' in the Disk Utility, to make sure that everything is fine. As suggested in a comment above, consider a PRAM reset and an SMC reset, to make sure everything is on the same page.

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