HighDPI

sudo defaults write /Library/Preferences/com.apple.windowserver.plist DisplayResolutionEnabled -bool true

pip

wget https://bootstrap.pypa.io/3.2/get-pip.py
sudo python get-pip.py

brew & gnu tools

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
export PATH="$(brew --prefix coreutils)/libexec/gnubin:/usr/local/bin:$PATH"
brew install findutils --with-default-names
brew install gnu-indent --with-default-names
brew install gnu-sed --with-default-names
brew install gnutls
brew install grep --with-default-names
brew install gnu-tar --with-default-names
brew install gawk

Hackintosh

Build an OS X boot disk

http://diskmakerx.com/

On QEMU/KVM

https://github.com/kholia/OSX-KVM