Ram issue - problem

One possibility is you haven't properly seated the RAM stick you're having problems with. The other possibility is that it's defective.

 

GGJ is correct. Ran into same issue upgrading RAM in a 13" MBP. Problem was the first stick inserted was not pushed in firmly enough. Also make sure the little plastic tabs fit into the small notches on the sides of each stick.

If you still have a problem you can the AHT or MemTest for Mac to check the RAM.

 

Current RAM is 1067MHz, can i get use a 1333MHz ram card?

hi i have a Macbook 2008 aluminium. 2.4 GHz.

Wanted to upgrade my RAM from 2GB to 4GB.

My current 2GB (2 cards of 1GB each) runs at 1067GHz, will a 4 GB ram (2 cards of 2GB each) running at 1333GHz work???

Also, I read in one of the blogs that this macbook can support up to 8GB even though Apple Support says a Max of 4GB

Please help! Mountain Lion is running really slow
Thanks

 

You can find specs on all Apple products, including maximum RAM:

• By visiting EveryMac.com: Actual Maximum RAM
• By selecting your model on the Crucial Memory Advisor™ Tool to find RAM information
• By using Mactracker
• By entering your serial number here to find specs for your model.
  (Be aware that some models can use more RAM than Apple shows. Check EveryMac to verify actual usable RAM.)

Slow performance doesn't always relate to insufficient RAM, although it could be a factor. To determine if you can benefit from more RAM, launch Activity Monitor and click the System Memory tab at the bottom to check your page outs. Page outs are cumulative since your last restart, so the best way to check is to restart your computer and track page outs under your normal workload (the apps, browser pages and documents you normally would have open). If your page outs are significant (say 1GB or more) under normal use, you may benefit from more RAM. If your page outs are zero or very low during normal use, you probably won't see any performance improvement from adding RAM.

Mac OS X: Reading system memory usage in Activity Monitor