Apple MacBook Pro (13-inch, Mid 2010) - Manual (Page 45)

45 Chapter 3 Boost Your MacBook Pro
2 Push the levers on the sides of the memory module in an outward direction to release
the module from the memory card slot.
The memory pops up at an angle. Before removing it, make sure you see the half-circle
notches. If you don’t, try pushing the levers outward again.
Notches