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2009年6月発売、2.66, 2.8, もしくは3.06 GHz Core 2 Duo Processor

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Replaced hard drive, now computer moves slow

I have a mid-2009 MacBook Pro 15. When it wouldn't boot properly, diagnostics told me there were S.M.A.R.T. errors affecting the hard drive. I replaced the it with a new (Toshiba L200) hard drive--a larger one, 1 TB.

After finally booting the laptop using my external hard drive (MyBook), I installed OSX Mavericks from the internet. I then used an old backup from that external drive, transferring everything from my most recent backup in 2014.

Then I noticed that iTunes was very slow/unresponsive at certain moments (like freezing when I would try to scroll down with the trackpad. There was a lag when in FireFox sometimes, as well. In the App Store, the newest OSX update is not compatible, apparently.

When I first ordered this laptop, I paid extra for the most possible RAM. I know the RAM should handle whatever I may be doing. Yet I'm not sure what I can do to speed this thing up. There is so much free space on the hard drive. Does anyone have any feedback for me on this? I'm in uncharted waters. Thanks!

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Your systems specs: MacBook Pro 15" 2.8 GHz Core 2 Duo (2009)

Your replacement drives specs: Toshiba L200 2.5" HDD

The last OS your system will support is El Capitan 10.11.x

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I'm less concerned with the your choice of drive. You have a SATA II (3.0 Gb/s) system so the drive you put in needs to support this older spec. This drive does, its fine!

One of the issues the unibody system have is SATA cable breakdown. A slow system could be a worn cable. Here is the IFIXIT guide to replace it: MacBook Pro 15" Unibody Mid 2009ハードドライブ and here is the part you'll need: MacBook Pro 15" Unibody (Mid 2009 to Late 2011) Hard Drive Cable - Apple P/N 922-9751. To help prevent this from happening again place some electricians tape under the cable where it rubs against the upper case. You'll also want to check the plastic bottom cover tabs are not broken. Make sure the one nearest the cable is in good shape. What can happen is the cover can flex damaging the cable. I add some stiff foam tape on each side of the cable to protect it as it crosses the edge of the optical drive.

Sadly, you'll want to reformat the drive and re-install the OS and your data. As the drives structure is likely damaged from the bad cable.

You may also want to up the RAM to the max this system supports (8 GB) if you haven't already.

MacBook Pro 15" Unibody (Mid 2009-Late 2011) Hard Drive Cableの画像

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MacBook Pro 15" Unibody (Mid 2009-Late 2011) Hard Drive Cable

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You are clearly very knowledgeable on this subject. When you say it "could be a worn cable," I just wonder how certain I should be about that conclusion. Not to nit-pick, of course. I'll now be over-budget for this little endeavor, so I just need to be sure about any extra costs. As you surely can understand! Thanks!

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Let me rephrase - The most probable!

If you do a search here on IFIXIT you'll see others with the exact same symptoms which had the same doubts. And once they put in the new cable all the problems went away. Thats not to say a few others also needed to replace their drive as well, as the bad cable damaged the drive as they continue to use it far to long so the master boot sectors got damaged or their drive died soon afterwards as they had failed to reformat the drive.

If you order the cable from a reputable source and it failed to fix things then you should be able to return it. The only risk here is your skills and time.

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Utmost graces, Dan. I will embark on this new odyssey soon.

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Toshiba L200 is an 5400r with 8M hard disk. It's actually not that good and it's cheap .

If your origin hard disk is high-quality or even an SSD, this situation is actually simple.

By the way, your computer is an 2014 model, it's not a new one, it's simple for it to work little bit slow, actually.

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Re-read what he stated his system is a 2009 model. He was explaining that he used a backup from 2014 as he hadn't been very good on maintaining his backups.

He also wanted more space (he bought a 1 TB drive). Yes, a SSD would be faster but it's more expensive, more so for the larger drives.

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Charlie Chainz さん、ありがとうございました！
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