2 Replies Latest reply: Apr 17, 2012 11:24 AM by wjosten
jeffreyMJacques Level 1 (0 points)

I've been trying to upgrade my RAM to 8 GB from the 4 GB on my MacBook Pro Model 7,1, late 2010.


My 4 GB runs smoothly; I can get 6 GB to run smoothly, switching 4 GB PNY to banks 0 or 1 without a problem.

All memory tests good in either bank.


When both 4 GB RAM modules are inserted, the MacBook Pro hangs a few seconds after the gear starts turning on start-up.

I have now tried two pair of 4 GB RAM modules. Same results every time.


I am running all the OS updates from Apple using OS 10.6.8. I am now running 6 GB RAM without a hitch. Any suggestions on how to get both 4 GB RAM modules to work together so that I'll have the advantages of the full 8 GBytes?






(P.S. Search of pasts posts not helpful.)

MacBook Pro, Mac OS X (10.6.8)