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Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

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Cannot boot up from external HD

Genius Bar informed me after 12 years of solid use my internal HD died.

I installed a new 256GB SSD and tried to boot up using Time Machine backups stored on my external HD with no success. I can see the external HD at initialization but cannot get the system to boot up any further. Also tried to boot up in recovery mode.

All three approaches as outlined in APPL support site, but only get the circle with a slash through it. Looking for suggestions.

Отвечено! Посмотреть ответ У меня та же проблема

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At this point you’ll need to take your dead internal drive out and put in your new drive. But we do have an issue which we do need to address here as your system used an older SATA spec SATA II (3.0 Gb/s) and most of the drives sold today are SATA III (6.0 Gb/s).

Basically, you can’t use most of them as they are too fast! You need to find a drive which is able to run at the slower SATA speed (older fixed speed) or a newer SATA III drive which offers auto speed sense technology! Thats a drive which has the smarts to match to the systems SATA ports data I/O. Many of the drives sold now don’t offer this technology as the need to support older systems like yours has waned so to be competitive they have removed the logic (saving pennies). So do be careful as the rev of the drive can be a factor as in the case of Seagate drives. And Western Digital drives don’t offer sense technology in their current drives.

Now the fun starts! How do you tell? You need to review the given drives spec sheet so as an example the Samsung 870 EVO offers the needed ability to match up. Looking at the spec sheet here we can see the Interface line states clearly:

SATA 6 Gb/s Interface, compatible with SATA 3 Gb/s & 1.5 interfaces

Review the spec sheet of the drive you are looking at if it doesn’t state it clearly like this find another drive.

Next Step

You’ll need to create the needed OS installer drive as a bare drive doesn’t offer then needed files to run. Here we’ll need a friend to help you who has a Mac system and you’ll also need a 32GB USB thumb drive.

Using your friends system first format the USB drive to GUID with a journaled file system using Disk Utility

Next download the OS installer that your system can support. The highest is OS-X El Capitan (10.11.x), download from Apples severs here: How to get old versions of macOS

Next Follow this guide to setup your USB drive How to make a bootable OS X 10.11 El Capitan installer drive

Now using it on your system you should be able to boot up with it. If you can’t try using the Option (⌥) to access the Startup manager to select the bootable drive. If you don’t see your installer you either have a problem with the drives setup or the USB port has a problem. See if the other port works.

Reference: Mac startup key combinations

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7 Комментариев:

Thanks danj I have taken steps to return the Crucial 250 to Amazon. Plan to buy a compatible SSD as you suggest ... more to follow.


Is there an 'afterlife' for a BX200 2.5 inch SSD I have been told is 'dead' ?


@mjmulcahy - Haven't heard of any way to reanimate SSD's once they die. Did you try reformatting it?


Dan - I have installed the new HD you suggested. I downloaded the older macOS bootable file into my external HD however I cannot get to start up disk manager I order to navigate to the bootable file in order to reinstall El Capitan. Is a live phone call possible ? I’m in SoCal. Thx


@mjmulcahy - What is the drive you are going with and what are you using now for a system (OS)? MS Windows Disk Manager won't help you, if thats what you are running. You need to be running macOS and use Disk Utility within it.

Talking on the phone won't help if you don't have what's needed.


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