I everyone, I was trying to install ROS on my clean install of OS X 10.7.3. I was following the tutorial bumped into a problem related to pysvn, installed it from source and after that I'm getting the following error: cabrita$ rosinstall ~/ros "http://packages.ros.org/cgi-bin/gen_rosinstall.py?rosdistro=electric&variant=desktop-full&overlay=no" rosinstall operating on /Users/cabrita/ros from specifications in rosinstall files /Users/cabrita/ros/.rosinstall, http://packages.ros.org/cgi-bin/gen_rosinstall.py?rosdistro=electric&variant=desktop-full&overlay=no Installing https://code.ros.org/svn/ros/stacks/ros/tags/ros-1.6.8 to /Users/cabrita/ros/ros Failed to checkout from url https://code.ros.org/svn/ros/stacks/ros/tags/ros-1.6.8 : callback_ssl_server_trust_prompt required ERROR: Failed to install tree '/Users/cabrita/ros/ros' Checkout of https://code.ros.org/svn/ros/stacks/ros/tags/ros-1.6.8 version into /Users/cabrita/ros/ros failed. Could this be related to the pysvn installation? Maybe related to the fact that the ros.org/wiki was down? Or am I doing something wrong here? Thanks for the help in advance! Best regards, Gonçalo Cabrita