Long time ago when I have switched to Mac I have missed “apt” from debian. APT is package manager the easiest tool I have ever seen.
Mac is more GUI based, anyway there are some tasks you would like to do/run from command line. For example mac doesn’t have “wget” command and there can be much more comands you would like to use but they are not there. In this case you can install them by using some package manager.
Last weekend I have found the project called HomeBrew which is package manager for OSX based on Ruby. So what is homeBrew?
Homebrew is the easiest and most flexible way to install the UNIX tools Apple didn’t include with OS X.
Very easy to install and use.