Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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How to swap my harddrive and SSD location without data transfer.

I put a new SSD and HD in my Macbook recently. I put my HD in a bracket and my SSD in the original HD socket. This was due to the fact that I had to wait for the bracket, but wanted to install OSX on the SSD to use it asap.

I have the idea though that the metal on metal connection in the bracket causes short circuit and want to swap the locations of my HD and SSD. When I do this my Macbook does not understand.

So to state my question exact:

Is it possible to swap the locations of the SSD and HD without having to transfer everything of one disc to an external.

On of the main reasons I think is that the user folder is located on the HD, which then is not found by my Macbook due to the swapping.

Anybody got an idea?

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I assume you have replaced your optical drive with a HD/SSD carrier per this IFIXIT guide: Installing MacBook Pro 13" Unibody Mid 2012 Dual Hard Drive.

There are a few of issued you'll need to work out here before altering your system. First you need to make sure your systems firmware is up to date follow this Apple T/N: About EFI and SMC firmware updates for Intel-based Mac computers. Make sure yours is at this level or newer. I don't recommend moving the HD from its current location as only the HD SATA port has HD crash guard protection.

The next issue is if your system can support the drive you are planning on using. Review this: OWC Data Doubler Take not in the note in Red if you have a MacBookPro8,1 model. It makes no difference who's carrier you used they all face the same problem as the issue is within the logic board of the system. Here you will need a FIXED SATA II (3.0 Gb/s) drive. You can't use a SATA III (6.0 Gb/s) drive or one that auto senses the systems SATA I/O ports speed.

OK, so you are ready to go forward.

I would recommend you first create a bootable USB thumb drive (16 GB) and then copy over to it the OS installer. This will take less time then allowing the system to do internet recovery and you won't need to move the SSD from the optical bay (which is the best place for it). Follow this guide on setting up the USB drive: How to Make an OS X Yosemite Boot Installer USB Drive

If you want to do internet recovery onto your new SSD you will need to put the SSD drive into the HD bay and then boot up the system in recovery mode. Here's an Apple T/N that explains things: About OS X Recovery. After it's running move the SSD back into the optical drive bay and put the HD back in its rightful place.

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What makes you think your HD is short circuiting? So your HD is in your cd/dvd drive slot right now with an adapter? If so, you may want to buy another adapter (they are cheap) and see if that fixes your issue. I had the exact setup on my MacBook and never experienced any issues.

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There is no way that the SSD or HDD for that matter will cause the computer to short out ...

install the SSD in the place of the original HDD, install osx, once done let the laptop restart and go through the process of setting up once you get to the point where the laptops asks you if you want to transfer from a drive or time machine, connect the original HDD and use it as your backup tyo restore the laptop to its original state but with the SSD. Also make sure that the SSD is of the same size as the HDD, as if its not you will have to transfer from the original HDD to the SSD.

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