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OS X make a bootable flash

hdiutil

iso==> dmg
hdiutil convert -format UDRW -o destination.dmg source.iso

dmg==> usb

sudo dd if=source.dmg of=/dev/rdisk1 bs=1m

OS X Python set up

homebrew

ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go)

install Python from http://www.python.org/getit/mac/

install distribute (easy_install needs it)

wget http://python-distribute.org/distribute_setup.py
$ python distribute_setup.py

install pip,virtualenv 

easy_install pip

pip install virtualenv

pip install virtualenvwrapper

vim .bash_profile

source /virtualenvwrapper.sh