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Booting from SSD in place of the superdrive?

Hi guys.

Im about to follow this guide :-

Link text

And im wondering. My mate says that I wont be able to set my SSD as a boot drive because Mac OSX will see it as a disk drive.

Is this true?

Just need to know

Ross

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I hate to disagree with your mate but I believe he's in the wrong. The Mac doesn't care what is in that physical space inside the machine, it pulls the information as to what the device is based on, well, what the device is. When it attempts to communicate with whatever is connected to that particular SATA port it determines what the device is based on the response it gets.

Basically, if it powers up that SATA port and an optical drive / disc drive starts communicating, then it identifies it as an optical drive. If it powers up that SATA port and a hard drive / SSD starts communicating, then it identifies it as a hard drive / SSD.

I outlined setting this new drive as a boot location in this answer about a week ago. Basically once the hard drive is installed, and assuming you've already moved your OS or installed an OS onto it, you will instruct the Mac to boot from this new hard drive vs the original hard drive. You can do this by following these instructions:

  1. Power the Mac on while holding the "option" key on your keyboard
  2. After a few seconds a gray screen should appear with one or more hard drives visible. Any attached hard drive that has a bootable operating system will show here.
  3. Select the desired hard drive and click "return"
  4. Once the Mac boots to the operating system, open System Preferences
  5. Open Startup Disk
  6. Select your desired startup disk
  7. Click restart to finish the process

Apple KB article detailing how to select startup disk

Hope this helps you out! Perhaps you could wager a bet with your friend and get a free drink out of this when it works.

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sorry to both of you but the cable is what matters NOT the ex-drive.

the cable will ID the drive no matter what you put in there as a half-

speed drive because it is a 3G cable

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Hi! Careful with this: some macbooks will not hibernate if SSD start up disk is installed in the optical bay (in those models that have one, of course).


The "symptoms" when I did that: MacBook just didn't hibernate, did not turn off automatically after autopoweroff minutes in pmset, nor turned off if scheduled. The consequence of this, a very important battery drain overnight (around 5% per hour) that I just wasn't able to solve applying any pmset setting combination / SMC reset / PRAM reset / macOS clean installation / previous macOS versions. I also spent several hours trying to determine if any startup process prevented deep sleep / hibernation... nothing seemed to work, so I almost gave up and attributed this to a hardware malfunction.

But... the culprit was a start up SSD disk installed in a case replacing the superdrive, that is to say, installed in the optic bay. 

I simply changed the disks places, with the start up SSD connected to the native disk bay, and the issue was solved!

Hope it helps!!

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귀하의 답변을 추가하세요

Ross Johnston 님은 대단히 고마워 할 것입니다.
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