You could have downloaded EnergyRB 1.0 for Mac from our application library for free. This free Mac app was originally created by Bob Delaney. The software is categorized as Education Tools.
From the developer:
EnergyRB allows you to easily find and display energy eigenvalues and eigenfunctions for the one-dimensional time-independent Schroedinger equation. Incorporating REALbasic's RBScript, almost any potential energy function can be entered by the user. This function does not need to be even.
You may want to check out more software for Mac, such as PianoRoll, eduMap or FRS Clocks and Time, which might be similar to EnergyRB.