Apple’s new support document HT3918 covers the easy steps to upgrading your RAM (spoiler – it is exactly how you’d think you’d do it). Apple requires the same 1066MHz SDRAM that were in previous models. You can pick this up at Amazon (2x2GB)4GB for $80 or the 8GB (2x4GB) upgrade for about $600-$700.
Pasted installation below:
To install memory into the bottom slot, follow these instructions:
- Turn off your computer by choosing Shut Down from the Apple (?) menu.
- Disconnect all cables and the power cord from your computer.
- Place a soft, clean towel or cloth on the desk or other flat surface to prevent scratching the LCD display.
- Hold the sides of the computer and slowly lay the computer face-down.
- Using a Philips screwdriver, remove the RAM access door in the bottom of your computer.
- Remove the access door and set it aside.
- Untuck the tab in the memory compartment. If you are replacing a memory module, gently pull the tab to eject any installed memory module.
- Insert your new or replacement SO-DIMM into the empty slot, keeping in mind the orientation of the keyway of the SO-DIMM as shown below.
- Once inserted, press the DIMM up into the slot. There should be a slight click when the memory is seated correctly.
- Tuck the tabs above the memory DIMMs, and re-install the memory access door.
- Stand the computer in its upright position, reconnect the power cord and all other cables to the computer, then start up the computer.