Install Bash version 4 on MacOS X

gistfile1.sh

# Install Bash 5 using homebrew
# brew install bash

# Or build bash 4 from source...
curl -O http://ftp.gnu.org/gnu/bash/bash-4.4.18.tar.gz
tar xzf bash-4.4.18.tar.gz
cd bash-4.4.18
./configure --prefix=/usr/local/bin && make && sudo make install

# Add the new shell to the list of legit shells
sudo bash -c "echo /usr/local/bin/bash >> /private/etc/shells"

# Change the shell for the user
chsh -s /usr/local/bin/bash

# Restart terminal.app (new window works too)

# Check for Bash 4 and /usr/local/bin/bash...
echo $BASH && echo $BASH_VERSION

# Put this somewhere in your dotfiles to turn on recursive globbing
shopt -s globstar

# Source your dotfiles...
source path/to/dotfiles

# Now you can double glob your way into distant directories
cd some/uportal/project/root
cd **/skins