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Modèle début 2011, A1278 / 2.3 GHz i5 ou processeur 2.7 GHz i7.

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computer running slow, replaced with a ssd, not booting

so i bought this laptop, the women claimed it was water damaged, i opened it up and there was no sigh of any damage, everything was working just super slow, i ordered a samsung 850 evo 250GB, got a bootable usb ready to install El Capitan, but it always gets stuck while starting up

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OK, lets backup here...

Using your other Mac via the SATA to USB adapter can you see the drive using Disk Utilities? Correct? If you can reformat the drive and create a new GUID partition map as well as create a Mac OS Extended (Journaled) partition. Once done from this same Mac, follow these steps: How to install OS X on an external drive connected to your Mac While this TN is assuming you are using it as a spare boot drive the steps are the same for setting up a fresh drive for another system. Jump to the 'Install from your normal startup disk"

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I would start off replacing the HD cable as they tend to breakdown. Here is the IFIXIT guide: MacBook Pro 13" Unibody Early 2011 Hard Drive Cable Replacement and this is the cable you want as it's the improved version: MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable.

But before you do that visit any Apple Store as Apple has been replacing them for free for a lot of people. Put the original drive back in before you go.

Let us know how it goes.

Image MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable


MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable


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thanks for your reply, i didn't mention that i connected the ssd via usb and tried to boot that way, didn't show up (hold command during startup) i also tried that on my imac (mid 2011, 21.5) it didnt show up either, i formated the drive with disk utility like it said in alot of youtube videos, didnt show up either, but my bootable usb always shows up


Bummer ;-{ Sometimes when the cable goes it messes up the drive too. If you can't reformat it its time for a new drive. As its a new samsung 850 EVO drive you should be able to return it where you bought it to get a new one or contact Samsung for a replacement under warranty.


I'm sure the drive is fine. i have to agree with Dan on this and would change the cable or you could even hook up the SSD to a SATA to usb adapter and try to boot ... if you get the same issue, it is not your cable. usually if its the cable you will get a file with a question mark instead of the apple as the computer cannot see the SSD.


@rebootgozo - FixPal already gave the USB connection a try. Sadly, I suspect the drive has bit the dust.


shame ... :( its quite rare that an SSD failed...


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