Whats the equivalent of the unix tree command on OSX

You can install the pstree command using either Homebrew (my personal favourite), MacPorts or Fink and you'll get a command-line, tree view of processes on your Mac.

With Homebrew installed, just run:

brew install pstree

then use it like pstree from the command line.

You could use a tool like Keyboard Maestro but it might be a bit overkill.

If you just want to execute a command in Terminal and close the window again:

• Put command in a shell script
• Make it executable (chmod +x ...)
• Move shell script to a convenient place (e.g. our Desktop)
• run shell script/command by double click