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

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New SSD not detected

I bought a Samsung SSD 840EVO drive to upgrade, but the laptop doesn't detect the drive. I tried a second drive that I bought for my second laptop thinking it may have been a faulty drive but this drive also doesn't show up.

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What was the second drive? Were you having any problems with the original drive?

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A new internal drive normally ships unformatted. Unless the operating system on the old boot drive posts a dialog box offering to format the unrecognized drive, the computer doesn't "detect" anything because there isn't anything the operating system can speak to yet.

Of course, if the way you installed this SSD was to remove the previous internal HD and install the SSD in its place, without formatting the new SSD and installing a bootable operating system first, then there's no operating system or formatting utility at all.

What steps have you already taken? If you can give us a detailed list of the things you've already done, in order, it will be easier to determine where the problem is.

A common technique to replace an internal boot HD with an SSD would be to:

  1. attach the SSD as an external drive first through USB/FireWire/ Thunderbolt
  2. use Disk Utility to format the SSD
  3. clone the operating system+user data from the internal HD to the external SSD using Disk Utility, SuperDuper! or Carbon Copy Cloner (you can also do a clean operating system install by downloading an installer from the App Store and installing it on the new drive)
  4. then open up the computer and swap the drives

That way, once you restart the reassembled computer, you can at least be sure that there's a drive with a bootable operating system available. If you're following the technique I've outlined, it's wise to try booting from the new external SSD before installing it internally, just to make sure the computer recognizes the drive as bootable.

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Thanks, this makes sense but I do not have a casing to use to attach the drive to my computer.

However I do have 2 computers so I'm wondering if I can format it by connecting the computer with the unformatted drive to the other computer through Firewire? I seem to remember that to do this you hold down T when turning on ?

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That's correct. You start the computer-as-external hard drive while holding down the T key as you power up. If it works, you should see a FireWire icon bopping around on the target machine's display. I assume the same technique works with Thunderbolt, but I've never had the opportunity to try it. I've also never tried to mount a computer with an unformatted drive as a target drive, but I don't see why this shouldn't work. I hope you'll report back and let us know if this works...In future, an external SATA-FW or SATA-USB interface is a handy thing to have around.

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it worked with Firewire ! Thanks so much. Only I have another problem... that is very wierd. I restored from a Timeline backup and it doesn't accept my password to login that I have been using for the past 10 years! I have racked my brain and can't work out how it could have changed. Has this happened to anyone else?

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If my SSD cannot be recognized how will any computer find it either with a USB or firewire....I does not show up in utilities at all.

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If a new, unformatted SSD isn't recognized at all, then either the drive has failed or it isn't installed correctly. If the drive is dead, yell at the manufacturer/retailer for a replacement. If it's a connection problem, try: Disconnecting/reconnecting the SSD, swapping out the SATA and power cables, try a different USB/FireWire/Thunderbolt cable, try a different external housing (or try an external housing for an internal mounted drive). If the drive is unformatted, it won't appear in the finder; you have to format it before there's anything visible. If drive appears in Disk Utility or another formatting tool, it will show up only as the drive mechanism - the finder volume will only appear after you've formatted it using the partition tool. Oh, and handling aftermarket SSDs is often kind of twitchy if you aren't booting from Mavericks/10.9 at a minimum.

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To answer the question “laptop does not detect the drive” as follows:

Also bought a Crucial 525 SSD drive and yes my mac did not recognize the drive in Finder nor in disc utilities.

I studied the advise and did not get a good answer why the drive is not detected.

Not being scared of computers by now, I again tried to format the drive in disk utilities and saw the view button in the left hand top corner and when opened it revealed “show only volumes” which is the standard configuration and “show all devices” which I then selected and problem solved.

The disk was detected and I could format it.

Hope the info will help.

Gurupvd

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I have a similar problem trying to install a Samsung EVO 850 SSD in my Macbook Pro early 2011. The guys at the apple store told me to install the new drive, hold down cmd R to go into recovery mode, then install a new OS on the drive. However when I got to that point it didnt't recognize the SSD. So I used disk utility to erase the SSD, then it recognized the drive & it let me download Mountain Lion from the internet which seemed to go well. Then I tried to restore from Time Machine which also went well. However, when it was done it wouldn't recognize my password. I tried restarting & now it get the Apple symbol & the spinning wheel. I also have an iMac. Should I try formatting the SSD as an external drive as described above? Thanks for your help!

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How about connecting your two systems in Target Mode, here's a TN on how: OS X El Capitan: Transfer files between two computers using target disk mode don't worry about the OS version this feature has been in the systems for a longtime.

Run Disk Utility to check your drive. You may need to replace the drives SATA cable if the drive has errors.

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I got a brand new Samsung SSD for my MB Pro.

I can actually format it in Linux, but not in MacOS. I‘ve read on the Net that getting a new SATA cable might help (There’s presently a sale on them…).

What do you think?

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My drive shows up in disk Utility, but I cannot format or partition it. I get perhaps halfway into the process, and then it comes to a full stop.

Disk Utility says no-no, and it's back to square one.

I also tried the FireWire "trick", only with the same result.

I have ordered a new HD SATA cable. Will let you know how things unfold then. :)

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Time has passed…

To wit: The internal HD cable was indeed flaky (that’s what made my old disk behave as though it was dying). I had a conversation about this with OWC, and I bought a new cable from them. Swapping cables was straightforward (it requires the eyesight & steady hand of someone <50 years…). I formatted the SSD with a cable-&-power-thingy (a device that has a socket for a HD & power for it, too, thus any drive can be tried w/o being installed in a computer) with the aid of my MacMini.

Finally, restore from backup worked, although I ended up with another user (no sweat, my old user was (is) still there.

Put SSD back in Mac w/ new cable, and: Works like a tee! Much thanks to a young steady-eyed & steady-handed friend.

As for the old HD, I hooked it up to the cable-&-power-thingy, and Disk Utilities told me it was jest fine. And indeed it was.

So to sum up: Maybe it would have worked "out of the box" had I replaced the HD cable first…

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Hi guys.

I recently bought a SSD 840 EVO to replace my previous seagate SSD. After loading it on disc utility, when I select the Samsung drive it does not allow me to click on partition or mount. It also does not show when I try to reinstall OS. I do not have any external cable so and need this drive to work ASAP. I have interviews to prepare for :(

Please help! Thanks in advance,

Jonathan

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Use a Windows 10 install DVD or USB and format blank hard drive though the setup.

Cancel the Windows 10 setup when files load.

Reboot Mac and format through Drive utility.

Install MacOS or restore from TimeMachine.

Can also be done with Linux install disc.

Just need to format the drive for Drive utility to see the drive.

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I just installed a Samsung 860 EVO in my mid-2009 MacBook Pro, as a replacement to the HD that crashed.

Initially, I thought that the unformatted drive would show up as an option for OS X install and that the install process would take care of it, so I directly replaced the internal HD with the SSD. The SSD did not show as an option for installation.

Searched for a solution and found this thread, I did not need to remove the SSD and format it while connected as an external drive; from the install screen I selected Disk Utilities, formatted the drive, quit disk utilities and proceed with the install screen and the drive showed as an option.

Thanks for the help.

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