Insert an iFixit opening tool into the seam between the keyboard area and bottom cover.

Using another iFixit opening tool, slide along the seam to unhook the clips.

There are clips all the way around the seam. You may hear a popping sound as the clips come loose. This step may require some force to separate the back cover from the laptop.

When the front of the laptop is open, you can use your finger to hold a corner open then slide an iFixit opening tool along the seam toward the back corner.

After the clips have been released, flip the laptop over and lift the cover.