A maxmem=2048 will allow the system to boot normally with 16GB RAM loaded however only 2GB RAM will be usable. This would limit the usable RAM to a maximum of 8GB (official Apple Max) however this also will cause a kernel panic during normal boot when 16GB RAM is physically loaded. It is possible to limit Max RAM to 8GB using the command: sudo nvram "-v maxmem=8192". " in safe mode, as opposed to "IntelHD.". Notice that the graphics card is listed as "Nvidia. You will be able to boot into safe mode OK and it will show the 16GB RAM in System Information. After doing some digging around, it sounds like the limitation has to do with the IntelHD graphics SW that is used by OS X.Ī 2010 i5/i7 MacBook Pro with 16GB RAM running MountainLion/Mavericks will kernel panic during normal boot.
I believe there is an EFI limitation in OS X Mountain Lion that will not allow the 2010 i5/i7 Macbook Pro's to be upgraded over 8GB RAM. The type of RAM needed is DDR3 PC3-8500 1066. If you have a 2010 MacBook Pro Core2Duo (13"), then you are in luck and you can upgrade to 16GB RAM. I am really upset that software is limiting my hardware speed.Any mid-2010 MacBook Pro i5 or i7 is limited to a maximum of 8GB RAM. I am running efi 2.0 firmware and OSX 10.6.6 do I need to downgrade my firmware or mod my firmware to allow this to work. The 20 macbook pros allow for 1333mhz what did they change in the 2010 mbp? What I need to know if anyone can help me is, what am I missing? Intel's chipset and C2D 2.4ghz or 2.66ghz work fine with a 1333mhz FSB. I am very new to apple and what I think is going on is the firmware is blocking the FSB from running at 1333mhz.
I called apple and he told me to do a smc reset that was the only thing I could try. I have seen on one forum you can zap the pram with one of the old chips and a 4gb and get it to boot with both 4gb chips but this did not work for me. I can use any one of the 4gb chips along with one of the samsung 2gb chips that came with my laptop and it works fine at 6gb. I have a 2009 2.53 15" and 1333mhz chips work fine I have 2 kinds Crucial and Mushkin. I want to upgrade my mid 2010 13" Macbook pro to 8gb 1333mhz.
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