Rosdep install dependencies missing

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I have no idea how to solve this, I did

rosdep install -a

as a result I get

ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
turtlebot_description: Missing resource urdf
ROS path [0]=/opt/ros/fuerte/share/ros
ROS path [1]=/Users/GCCS/fuerte_workspace/turtlebot
ROS path [2]=/Users/GCCS/fuerte_workspace/sandbox
ROS path [3]=/opt/ros/fuerte/stacks
ROS path [4]=/opt/ros/fuerte/share
ROS path [5]=/opt/ros/fuerte/share/ros
turtlebot_bringup: Missing resource app_manager
ROS path [0]=/opt/ros/fuerte/share/ros
ROS path [1]=/Users/GCCS/fuerte_workspace/turtlebot
ROS path [2]=/Users/GCCS/fuerte_workspace/sandbox
ROS path [3]=/opt/ros/fuerte/stacks
ROS path [4]=/opt/ros/fuerte/share
ROS path [5]=/opt/ros/fuerte/share/ros
turtlebot_node: Missing resource tf
ROS path [0]=/opt/ros/fuerte/share/ros
ROS path [1]=/Users/GCCS/fuerte_workspace/turtlebot
ROS path [2]=/Users/GCCS/fuerte_workspace/sandbox
ROS path [3]=/opt/ros/fuerte/stacks
ROS path [4]=/opt/ros/fuerte/share
ROS path [5]=/opt/ros/fuerte/share/ros
pointcloud_to_laserscan: Missing resource nodelet
ROS path [0]=/opt/ros/fuerte/share/ros
ROS path [1]=/Users/GCCS/fuerte_workspace/turtlebot
ROS path [2]=/Users/GCCS/fuerte_workspace/sandbox
ROS path [3]=/opt/ros/fuerte/stacks
ROS path [4]=/opt/ros/fuerte/share
ROS path [5]=/opt/ros/fuerte/share/ros