step by step install gym for mac os el capital

Install gym for my Mac

Mac OS: El captial
Environment: virtualenv 
virtualenv ~/gym
source ~/gym/bin/activate
git clone https://github.com/openai/gym
cd gym
pip install -e . # minimal install, it should be okay witout error if using virtual env
#install all simulation games, require #cmake,#swig (it requires #pcre)
mkdir __install_swig/
cd __install_swig/
curl --remote-name ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.37.tar.gz
tar -xzvf pcre-8.37.tar.gz
cd pcre-8.37
./configure --prefix=/usr/local/pcre-8.37
make 
sudo make install 
pcre-config --version #check pcre
#download swig from internet and save into the this folder
tar -xzvf swig-3.0.8.tar.gz 
cd swig-3.0.8
./configure
make
sudo make install
touch ~/.bashrc
echo 'LD_LIBRARY_PATH=/usr/local/lib:/usr/lib' >> ~/.bashrc 
echo 'export LD_LIBRARY_PATH' >> ~/.bashrc
source ~/.bashrc
#install cmake
sudo brew update
sudo brew install cmake
sudo pip install -e .[all]
#run example test from gym website