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Model A1286. Released February 2011 / 2.0, 2.2, or 2.3 GHz Quad-core Intel Core i7 Processor

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Startup issues with new High Sierra formatted SSD

I recently decided to purchase a 1TB Samsung EVO SSD to replace my older slower 1TB drive on my 2011 MBP unibody. (My old drive worked fine, but the read/write times were slow and I wanted faster performance)

I already have a smaller 500 GB SSD mounted where my Optical CD Drive used to be with a OWC Data Double Caddy.  This has High Sierra installed and boots and runs fine. No issues there.

With this new SSD in place, it was detected and. I was able to successfully format the new SSD Drive to OSX High Sierra (AFPS, GUID Map) on the same MacBook.

After this ran into some problems:

1) First few times, the MacBook boots through the whole startup cycle with the grey screen, apple logo etc - I am able to login and get to my desktop, all is well with the world.

After a few tries, now when I start-up the system, I immediately get the circle hazard symbol, the computer waits a bit, and boots up through the 500GB alternate drive that I have.

This is not what I want. I want my system to booth through the new 1TB SSD as my primary drive.

I re-started the computer in recovery mode, Disk Utility detects and shows the new 1TB drive, when I run first aid on it, it detects no problems.

This time I start the laptop holding down the option key - so I can then manually choose which drive to boot from. Again when I choose the new High Sierra 1TB SSD, it shows the apple logo very briefly and then immediately shows the circle line hazard, and again boots up on the other Hard drive.

I have tried this repeatedly and it always ends up not allowing me to boot from the 1TB, and defaults to my other drive.

Does anyone know what Is wrong?

The drive is showing no errors, the OS seems to have been installed fine.

Any help would be appreciated.




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You are facing a common issue here! Here’s a good writeup which gets into some of the issue Your Hard Drive Cable Is A Ticking Time Bomb

In the 2011 models we have a second issue which is also related to the cable. Apple designed the 2011 system to have the needed logic to support SATA III (6.0 Gb/s) drives, but only installed slower SATA II (3.0 Gb/s) and only setting the firmware for SATA II use only, later firmware updates took off the limit. The only part that was not able to support SATA III was the original HD cable! It was only rated for SATA II You’ll need to upgrade the cable with your better performing SSD.

Here’s the needed part MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable and yes! This is the 2012 version which is the better cable and this rev fixes the issues of the first ones, and here’s the guide to putting it in MacBook Pro 15" Unibody Early 2011 Hard Drive/IR Sensor Cable Replacement

Even still we have one more issue! Many people manage to damage the cable in the process of putting it in! You don’t want to crease the cable as that damages the foil traces within it. I use an old BIC pen Ink straw as a forming brake to roll the cable around to create a nice arc which doesn’t exceed the radius of the straw.

You’ll need to reformat the drive and install a fresh copy of the OS from the OS installer (don’t use cloning software) and then restore from your backup your user accounts, apps & data.

MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable Afbeelding

Product

MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable

$19.99

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Hi Dan, this was super helpful. I had tried almost every conceivable software approach and was reaching a dead end. I don't open my computer too often so initially i had ruled out hardware - but after reading this i did take it into a service center - they tried a different cable and it worked perfectly. So ended up purchasing a new connector cable for the drive ad things are super. thank you so much for the same.

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Happy to hear you're up and running! Don't forget to accept the answer - Thanks!

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Robby Banner zal eeuwig dankbaar zijn.
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