MacOSX cheatsheet

Homebrew

Switch to a different version: brew switch eg,

/u/l/L/Formula(master)$ brew versions mongodb
2.4.4-x86_64 git checkout d0cc30c /usr/local/Library/Formula/mongodb.rb
2.4.3-x86_64 git checkout 57a3ec4 /usr/local/Library/Formula/mongodb.rb
2.4.2-x86_64 git checkout 84c1b44 /usr/local/Library/Formula/mongodb.rb
2.4.1-x86_64 git checkout 3bffe56 /usr/local/Library/Formula/mongodb.rb
2.4.0-x86_64 git checkout 4e36c7c /usr/local/Library/Formula/mongodb.rb
2.2.3-x86_64 git checkout 527611d /usr/local/Library/Formula/mongodb.rb
2.2.2-x86_64 git checkout fe5bc4d /usr/local/Library/Formula/mongodb.rb
# ...

/u/l/L/Formula(master)$ brew switch mongodb 2.4.4-x86_64
Cleaning /usr/local/Cellar/mongodb/2.2.3-x86_64
Cleaning /usr/local/Cellar/mongodb/2.4.4-x86_64
14 links created for /usr/local/Cellar/mongodb/2.4.4-x86_64

Installing older version of homebrew formulas