Hi.
I have a macbook pro 13" mid 2009 with model ID Macbookpro5,5, Core 2 Dua at 2,24Ghz.... all webs (included Apple) say that the speed memory is 1066Mhz. My macbook says I have 4GB at 1333Mhz....?? What is the max Memory in this case???
MacBook Pro, OS X El Capitan (10.11.1)
A model identifier MBP 5,5 can accept 8 GB RAM with the following specifications; 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM. The best sources of Mac compatible RAM are OWC and Crucial.
I recommend that you replace the RAM with what Apple calls for. Higher frequency RAM may or may not work correctly. Occasionally a functioning MBP may start having problems after installing a new OSX due to RAM with improper specifications.
Ciao.
A model identifier MBP 5,5 can accept 8 GB RAM with the following specifications; 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM. The best sources of Mac compatible RAM are OWC and Crucial.
I recommend that you replace the RAM with what Apple calls for. Higher frequency RAM may or may not work correctly. Occasionally a functioning MBP may start having problems after installing a new OSX due to RAM with improper specifications.
Ciao.
I had this memory from the beginning and I didn't have any problems yet. The manufacturer in Samsung, Can I install only 1 module of 8GB?? or must be 4GBx2??
The reason of 8GBx1 is for give to my sister the 4GB module for her macmini ( she has 2GB and can update to 8GB), she has the system too slow with Capitan OS X.
A matched pair (2x4) is what a Mac is designed to operate with, will be the most efficient and fastest configuration. Mismatches will not allow attaining maximum performance parameters.
Ciao.
My system say this:
Your mac have 2 memory slots, each one accept a memory module of 1333Mhz DDR3, what is worng?? can i install DDR3 1333Mhz memory without problems?? I said I have 4GB DDR3 1333Mhz from the beginning. A1278 mid 2009.
I know the people could install 6GB in a Macbook that the max memory is 4GB.....so what is the real limit that I can install in my macbook pro????
In my initial post I indicated that the Maximum RAM that your 2009 MBP will accept is 8 GB and the correct specifications are: 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM. Your image indicates that one slot is empty, the slot is faulty or the RAM modules is not recognized. I cannot recommend RAM modules with a 1333 frequency in your MBP.
Ciao.
I think i am not explaining good. Sorry for my english.
I start again.
I have a Macbook pro 13" mid 2009 A1278, ID model macbookpro5,5, core 2 duo 2,26Ghz, 1 memory module of 4GB at 1333Mhz....only 1 module !!! from November 2009 until now...ONLY 1.... the Apple specification say max. of 8GB at 1066Mhz....1066Mhz not 1333Mhz....:
1. If the max memory speed is 1066Mhz....why can work at 1333Mhz memory module??? in PC computer if the system say a max of 1066Mhz and you install a memory at 1333Mhz the system will work at 1066Mhz AND THE SYSTEM SAY 1066MHZ AND I CAN MIX MODULE AT 1333 WTH 1066 BUT BOTH WORK AT 1066....I SAY AGAIN IN PC COMPUTER!!!
...IF THE MAX SPEED IN MY MACBOOK PRO IS 1066Mhz WHY IS WORKING AT 1333MHZ????.... WHAT IS THE REAL OR THEORIC MAX. SPEED OF MEMORY I CAN INSTALL???.
2. I know the people with macbook unibody installed 6GB when the specification say 4GB and they are working with that configuration loooong time...WHAT IS THE REAL O THEORIC MAX. MEMORY I CAN INSTALL IN MY MACBOOK PRO???
THANK YOU SO MACH
1. Do not assume that what a PC can do, a Mac can do or the other way either. They are two different designs with two very different OSX's.
2. In MBPs from Mid/Late 2007 through Late 2008, Apple specified that 4 GB RAM was the maximum but later third party vendors determined that 6 GB RAM would be accepted. When Apple designs a newer model MBP, they restrict their specifications to what is available at the time of testing but after release of the new MBP, RAM manufacturers will introduce larger compatible RAM modules that the MBP will accept. There fore there will often be two different RAM specifications for the same model MBP.
A 2009 MBP model identifier 5, 5 MBP will accept only 8 GB RAM. If you install more than 8 GB RAM in a 2009 MBP, it will only use up to 8 GB RAM or it may not function properly. This was Apples original specifications and no third party RAM is available that alters that limit. The correct RAM specifications for this model are: 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM. This is NOT theory, this is factual.
Ciao.
The correct RAM for a 5,5 is 1066MHZ, the maximum that is supported is 8GB (2 x 4GB)
But you can fit whatever you want.
Buona giornata a te 🙂
Ciao.
e a te
MEMORY 1333MHZ
