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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

4GB Ram supported... or not!?

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Member Since: Jan 15, 2010
Posts: 1
karuro is on a distinguished road

karuro is offline
Hello everyone,
sorry to start participating to this forum with a request for help.
This is what I have, according to Crucial detect tool:
MacBook 2.4GHz Intel Core 2 Duo (13-inch DDR3) MB467LL/A Specifications

It's a Generation 6 unibody aluminum Macbook.
I bought it with 2 GB of RAM included. I wanted to expand it by bringing it to 4GB, meaning I had to remove both the original 1GB sodimms I had and to buy 2x2GB pieces.
I bought 2 of these:
They reflect the exact configuration requested on my macbook.

I know it's probably an unknown brand but after installing them I had them recognized and perfectly functioning. That's when problems started arising.
I suffered frequent kernel panics once the ram started filling up, so I tried to check the ram with numerous tests in memtest64+ and Apple hardware thorough test. (Un)expectedly they all went well with no issues or problems reported. I tried an empirical test by removing a dimm at a time and by trying them on both slots. Again... they worked perfectly with just 2GB installed, not causing any panic under heavy stress and load (thing which resulted in immediate crash with 4GB installed).
The funny thing is, when I start my mac on bootcamp (windows 7 x64) they work ok, even under heavy pressure and overheating: i.e. demanding videogames.
It's frustrating to have never had any BSOD on windows and numerous freezes on mac os!!!
By the way, I have 10.6.2. I bought the new ram recently so I've never tested it on different configurations.
I would like to know if this is a weird hardware failure or a software one, or a mix of both maybe. It surely is disappointing when you start experiencing an unstable mac! It used to be the apple of my eye
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Member Since: Jun 03, 2009
Posts: 153
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Mac Specs: uMBP 2.4/4GB/250GB; iPhone 3GS

rzj90059 is offline
It must be some incompatibility with the RAM. I personally have never used PNY stuff, except for their thumb drives. Try switching it with another brand to see if the problem persists.

Tech Inventory:
uMBP 15.4" 2.4 Ghz/4GB RAM/250 GB, uMBP 13.3" 2.53 Ghz/4GB RAM/500 GB, iPhone 4 (Black), iPhone 3GS (Black)
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Member Since: Jan 14, 2010
Location: Greenville, SC
Posts: 70
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Mac Specs: Macbook Aluminum 2.4, 4g mem, 640 gig drive

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I got mine from Never had a problem, even under extremely heavy loads.
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Member Since: Nov 28, 2007
Location: Nambucca Heads Australia
Posts: 19,838
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Mac Specs: iMac i5 2.7GHz, 16GB memory, OS 10.10.4

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Take out the memory as it sure sounds like it is not Mac compatible and check out the precise specs from OWC as they are Mac specialists.
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