Unibody MacBook Pro models with 13" displays produced from 2009-2012.

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How to install Mac OSX Sierra on a new hard drive

I am installing a new hard drive on a mid 2012 13" MacBook Pro. How do I install the Mac OSX Sierra operating system?

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Do an internet recovery install. Here's how, remember with a new drive you will first need to go to Disk Utilities and format the drive GUID Mac Extended:


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The internet recovery would have the old previous OS X or even older right?

Well if it ends up being the case the OS can be updated using the apple app store and clicking on Mac OS x Sierra upgrade there.


@benjamen50 With a new drive an internet recovery is going to install the original OS X the machine shipped with. But you have to have a system installed to get to the APP store.


It wouldn’t work to put High Sierra on a new drive wich has a original installed OS X done through recovery. It will usually ask you to install OS X 10.8. It won’t allow you to jum straight to Hugh Sierra OSX 10.13


On my MacBook Pro with OSX 10.13I had a 240gb Solid state hard drive, but I needed bigger!

So I got a new Kensington 480gb SSD.

During formatting and installation, OSX 10.7.5 is automatically installed can’t do anything about it!

I wanted to install High Sierra it wouldn’t allow me until I installed OSX 10.8 Mountain Lion!


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How can you install Disk Utilities if the hard drive is new? does it have to be an Apple compatible drive?

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Any good had or Solid state will do, the drive needs to be formatted as will all drives.


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