Publicado originalmente por Guide to MacBook RAM Upgrades

MacBook
• All pre-unibody MacBooks have two RAM slots for SO-DIMMs (DDR2-SDRAM, PC2-5300, 667 MHz, 200 pins*). Apple default configs are paired. These are the maximum RAM upgrades for all MacBooks:
MacBook with Core Duo (Mid 2006): 2GB **
MacBook with Core 2 Duo and Calistoga chipset (Late 2006, Mid 2007): 3GB / 4GB ***
MacBook with Core 2 Duo and Crestline chipset (Late 2007, Early 2008, Late 2008 white): 4GB / 6GB ****
To find out which C2D MacBook you have you can check the FSB clock or the GPU: If you have a 667 MHz FSB and a GMA 950 you have a Calistoga C2D MB. If you have a 800 MHz FSB and a GMA X3100 you have a Crestline C2D MacBook. Do not confuse FSB speed with memory speed! 800 MHz FSB MBs still use 667 MHz RAM. Check your FSB speed in Sys Profiler.

• Unibody MacBooks have two SO-DIMM slots for PC3-8500 DDR3 RAM, 204 pins, 1066 MHz.
MacBook Unibody with Core 2 Duo "Penryn" and 9400M G chipset (Late 2008): 4GB / 6GB *****

• White MacBooks have two SO-DIMM slots for various types of SO-DIMMs:
MacBook white with Core 2 Duo "Penryn" and 9400M G chipset (Early 2009 white): 4GB / 6GB ***** (PC2-5300 DDR2, 667 MHz, 200 pins*)
MacBook white with Core 2 Duo "Penryn" and 9400M G chipset (Mid 2009): 4GB / 6GB ***** (PC2-6400 DDR2, 800 MHz, 200 pins)
MacBook white with Core 2 Duo "Penryn" and 9400M G chipset (Late 2009): 8GB (PC3-8500 DDR3, 204 pins, 1066 MHz)


MacBook Pro
• All pre-unibody MacBook Pros have two RAM slots for SO-DIMMs (DDR2-SDRAM, PC2-5300, 667 MHz, 200 pins *). Apple default configs are paired. These are the maximum RAM upgrades for all MacBook Pros:
MacBook Pro with Core Duo (Early 2006, Mid 2006 17"): 2GB **
MacBook Pro with Core 2 Duo and Calistoga chipset (Late 2006): 3GB / 4GB ***
MacBook Pro with Core 2 Duo and Crestline chipset (Mid 2007, Late 2007, Early 2008, Late 2008 17"): 4GB / 6GB****
To find out which C2D MacBook Pro you have you can check the FSB clock: If you have a 667 MHz FSB you have a Calistoga C2D MBP. If you have a 800 MHz FSB you have a Crestline C2D MacBook Pro. Do not confuse FSB speed with memory speed! 800 MHz FSB MBPs still use 667 MHz RAM. Check your FSB speed in Sys Profiler.

• Unibody MacBook Pro have two SO-DIMM slots for PC3-8500 DDR3 RAM, 204 pins, 1066 MHz.
MacBook Pro 15" Unibody with Core 2 Duo "Penryn" and 9400M G chipset (Late 2008): 4GB / 6GB *****
MacBook Pro 15" Unibody with Core 2 Duo "Penryn" and 9400M G chipset (Early 2009 bump, 2.66/2.93 GHz): 8GB
MacBook Pro 17" Unibody with Core 2 Duo "Penryn" and 9400M G chipset (Early 2009): 8GB
MacBook Pro 13"/15"/17" Unibody with Core 2 Duo "Penryn" and 9400M G chipset (Mid 2009): 8GB
MacBook Pro 13" Unibody with Core 2 Duo "Penryn" and Nvidia 320M (MPC89) chipset (Early 2010): 8GB
MacBook Pro 15"/17" Unibody with Core i5/i7 "Arrandale" and Nvidia 320M (MPC89) chipset (Early 2010): 8GB