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Changing Logic board from 8GB to 16GB, but still shows 8GB.

My Macbook took a jump to the floor and one of the USB ports was pushed into the cabinet and broke the main board, so I went on eBay and purchased a used one.

Seller said it was early 2013, and 2.3GHz and 16GB.

My old board was 2.4Ghz and 8Gb.

Upon changing the board, and thanks to iFix that went as a dream, I start the Mac. It took some time first time, but came up with the good old screen. Password Ok, and charging OK. Screen didn't take any damage in the "jump", so all looks fine.

Then I went into System to see status, and there I read to mu alas: 2.4GHz and 8Gb - same as I had before I changed the logic board.

So now my question is: Do I have to update any system Flash RAM or something like it? or should the system automatically find new clock speed and new RAM size?

And if the latter: the swindler on eBay has sold me a wrong logic board and charged me for 16Gb that I didn't receive.

8Gb boards are much cheaper to buy on eBay.

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Your system should have a copy of 'System Information' App in your Apps Utilities folder. See if that still shows the same info.

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I have a file called System Informations - yes, and it is datet last change: 24. October 2015, and it is 262Mb in size.

When I double click on it, it comes up with the exact same informations that I read when I go to the "Apple" icon and choose about, and system report.

I think I start to see the point, but question is how do I update it? Just delete it and the system will update it automatically?

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The systems S/N should be different than what your case has stamped on it. I suspect the seller sold you the same board as what you had.

The info is held within the logic board in NVRAM. The rub here is the setting would be already set when the board was powered up before you got it. There is nothing within your systems drive involved here other than the OS polling the NVRAM's info. Which is why I had you do it via the app to make sure there wasn't something funny here.

If you want you could try resetting it: How to reset NVRAM on your Mac but I don't think that would change anything.

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I took the old SSD (have upgraded to 900GG) on 256GB and inserted. Then I made a Sierra USB bootable. I wiped the disk and installed Sierra on the blank disk from the USB.

Then the System Information file came up with a date: 17. August 2017, and showed 2.4GHz and 8Gb, so no doubt - I've literally been swindled on eBay!

But that will become another process.

I guess I keep the board and ask the seller for a refund of 100$.

And dream of my 16GB....

Thanks a lot to all of you for all inputs.

Trygve

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Did you reformat the ssd?

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No I didnt. I mounted in the "old" HD into the "new" logic board.

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Not really needed!

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Trygve Stafne will be eternally grateful.
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