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Switcher Hangout The place for switchers to discuss their new machines, and how to work with OS X. General support can be had here for newbie stuff, like "How do I restart my new iMac?" :)

13" MacBook Memory Issue

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Member Since: Jul 19, 2011
Posts: 2
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Hello, I'm new to this and wanted to see if someone else has had this issue and been able to resolve it.

I've had my MacBook for a few years. I recently replaced the Hard Drive from 80GB to 250GB without any issues. After replacing the Hard Drive, I got the idea to also replace the Memory. I read in Apple Support that I can upgrade from 1GB (2 slots of 512) to 4GB (2 slots of 2GB). Here's where I got that info>> MacBook 13" Technical Specs

My Problem
So I received my 4GB Memory (2x2GB) today. I turned off my MacBook, removed all connections, removed battery and removed and replaced the original memory. Each slot had 512 and replaced with the new 2GB. I put everything back together and turned on my MacBook. I heard it boot but the screen remained black. I shut it off by holding down the power button and tried again with no luck. I didn't hear anything except my RAM booting up.
I removed everything again to see if maybe the memory was loose but they weren't. I got an idea to replace one of the new 2GB with an old 512. To my surprise, it booted up and the screen turned on without an issue. I clicked on "About This Mac" to see if it read it correctly and it did.
(Please see below from "About This Mac").

Memory Slots:

ECC: Disabled


Size: 512 MB
Speed: 667 MHz
Status: OK
Manufacturer: 0x2C00000000000000
Part Number: 0x38485446363436344844592D363637443320
Serial Number: 0xDA115BF0


Size: 2 GB
Speed: 667 MHz
Status: OK
Manufacturer: 0x7FBA000000000000
Part Number: 0x000000000000000000000000000000000000
Serial Number: 0x00000000

It shows the 2GB plus the 512 for a total of 2.5GB.
So I got the idea that maybe one of the two new 2GB memory was bad.
I swapped the 2GB with the other one and it booted up without a problem as well. I then tried to replace the 512 with the 2GB and the same thing happened. (I heard it boot but the screen was black). I now think that it won't allow me to upgrade to 4GB. I'm confused because Apple Specs clearly states that I can upgrade to a max of 4GB.

Here's my Hardware Overview from "About This Mac".

Model Name: MacBook
Model Identifier: MacBook3,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 2.5 GB
Bus Speed: 800 MHz
Boot ROM Version: MB31.008E.B02
SMC Version (system): 1.24f3
Serial Number (system): W874676BZ62
Hardware UUID: 6538F157-F682-5CA6-8528-DE8C7DDCD6A3
Sudden Motion Sensor:
State: Enabled

Any help is greatly appreciated.

Thank you!

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Apple says your machine can take 2 x 2 GB modules for a total of 4 GB while MacTracker says you can actually install 6 GB.

Unless you got hold of some bad or mismatched memory it should have worked. Where did you purchase the memory from? If possible, send it back for a refund and buy your memory from Crucial or Other World Computing.
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