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Upgrading 2009 Dual Core MacBook Pro


I have a 2009 15” Dual Core 3.0 gz MacBook Pro with 8GB DRAM, and a 1TB Samsung SSD, running OS X 10.11.6.

It runs fine, but,
i. it can’t upgrade to the latest OS from Apple, which leaves me vulnerable to security gaps,
ii. 8GB DRAM is no longer adequate for my needs,
iii. the latest software I use requires at least 10.12.

Is it possible to replace the motherboard within my MacBookPro with a refurbished quad core board that has either 16GB DRAM or 32 GB DRAM and upgrade the OS?
If not, do you sell any refurbished quad-core MacBook Pros with 16-32GB DRAM that can run ?


  • Hi David! Thanks for the post!

    Unfortunately your 2009 machine is not capable of housing a quad-core board, so an upgrade is not an option.

    If you are looking for a similar form-factor machine with upgradeable HD and RAM (so that you can use your current HD), then the mid 2012 is the only real choice -- it is the only expandable laptop that can go to the current OS (Mojave) and beyond. Technically you could use a quad-core 2011, but those only take up to High Sierra, and I would highly advise against 2011s because they have notoriously bad GPUs and they are therefore very risky to use.

    A 2012 will take 16GB RAM, but not 32GB. In fact, only in 2017 or so did Apple start offering 32GB configurations. And you have to buy them with 32GB, because newer MacBooks are not expandable.

    If I were in your shoes, I'd recommend the mid 2015 15" Pro, which comes with up to a 2.8GHZ quad i7, 16GB RAM, and 1TB SSD (this is actually what I use as my personal laptop). You can get these for $700-$800, and they represent a HUGE performance boost over a mid 2012, which will run you about $500. The mid 2015 is the final MacBook before Apple moved to the USB-C form-factor and removed all the other ports.

    Unfortunately I don't often get machines this new, but is a great refurbisher that has newer material.

    Hope that helps!


  • Understood. Can either the 2012 or mid-2015's you describe take an eGPU with Thunderbolt 3?

  • I'm not very familiar with those, but I don't think either will. 2012 has Thunderbolt 1, and mid 2015 has Thunderbolt 2. I believe it's only machines produced in the last couple years that can handle those.

  • FYI

    Apple recalls older 15-inch MacBook Pros because the batteries could catch fire

  • Only if they show symptoms. I think the recall was 2015-2017

  • I'd recommend the mid 2015 15" Pro, which comes with up to a 2.8GHZ quad i7, 16GB RAM, and 1TB SSD (this is actually what I use as my personal laptop). You can get these for $700-$800,

    Where can I get one?
    Also, is there any way to upgrade my OS on my 2009 machine from 10.11.6 to 10.12?

  • Unfortunately a 2009 is stuck at El Capitan, and Sierra is not supported.

    You can find that model 2015 on eBay. Otherwise I would try


  • I'm seeing ~$1,200-$1,500 for mid-2015 16GB DRAM ~500GB SSD.
    Is there any way to verify the integrity of the EFI on my 2009 MacBook Pro?
    Apple doesn't appear to let me reinstall it.

  • I may have gotten a good deal on my 2015, being in the business and all. But there are 2.2 and 2.5GHZ versions as well, which are cheaper but basically the same machine. The 2.8GHZ has a premium on it due to being top of the line.

    I'm curious why you suspect a problem with the firmware? It's generally not something you re-install on a Mac, or that there are issues with. You could probably dig up an old bootable ASD (Apple system diagnostic) DVD for that machine, but they were never particularly accurate or helpful.

  • edited August 20

    In 2015, someone hacked into our network. My roommate's Linux laptop was infected with a rootkit virus and the disk was corrupted. My LinkedIn account was hacked and sensitive data which was only on my Mac was posted to my account.

    Ever since then, I assumed my Mac is compromised.
    I run Cylance, ClamAV, MalwareBytes, etc. which report that my machine is clean. Avast, Sophos, don't find anything, either.

    That could mean that my Mac is clean. Or, that very professional hackers have comprised my machine and I can't detect it. I believe I need to run OS X 10.12 or higher for better detection.

  • Interesting. Of the tens of thousands of Macs I've repaired and sold, I've never witnessed one that was affected in such a way. Not to say it COULDN'T happen. Mac antivirus software pretty much doesn't exist because Macs are more secure and the bad guys just don't tend to go after them. Ironically Apple itself is the primary entity you have to worry about locking a MacBook and making it unusable.

    In any case, since your 2009 doesn't meet your requirements, you might as well get $200 for it on eBay and jump for that 2015. 2009 to 2015 represents a fairly mindblowing upgrade, so I think you will be happy.

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