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

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Replace original hard drive with a new SSD

I attempted to replace original hard drive with an SSD. The drive was reformatted, El Capitan was downloaded and all the files were transferred to the new drive. The new drive was then tested outside of the computer and the computer booted normally while the original drive was still in the computer. I replaced the original drive with the new SSD. Computer booted normally, but none of the applications work. They just do not open. So I took out the new SSD, left it outside and kept the original drive in the computer. Everything works fine. Computer boots off of the new SSD and all the applications work. Trying to see whether anyone has any clue as to why the new SSD could not work independently while in the computer. Thank you.

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Make sure the new drive is formatted GUID and MacOSX extended. A different type of format will work externally, even a FAT format will but internally it will not.

As to how you transferred the files: use migration assistant instead of dragging and dropping. This will move the Library sources which many programs require.

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I had formatted using Disk Utility as OSX Extended (Journaled) under scheme of GUID Partition Map. I have used Migration Assistant to move files (Applications and Documents) to the new drive. The drive boots the computer and runs all applications when connected by USB and original drive is in the computer.

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The next thing to check is the hard drive/IR cable that carries the data from the drive to the logic board. It can get damaged either from vibration of the hard drive that sits on it or (primarily) on the last step as it climbs over the top and runs onto the optical drive. Examine it closely for any dents or wear. If you see anything, replace it with the cable from the 2012 machine, you may have to alter the retains bracket. This cable should then have some kind on padding on either side of the cable to prevent the bottom over from coming into contact with it.

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