Okay, who's been screwing around with the OS similes?
Anyway, I use Safari on my MacBook Pro and I believe you have a few options:
- [Ctrl]-click on the page and select [Back] from the context menu
- Plug in a two-button mouse and use the right-click as usual.
- In the Keyboard & Mouse Preferences select "Tap trackpad using two fingers for secondard click" (not sure if this is available on the MacBook and not Pro-only, but worth a look. A nice feature I use quite a bit while in VMware.
- Use [Cmd]-[left arrow]
You didn't mention if you were just using the trackpad or if you had a mouse so I tried to cover both bases.
Safari has a few tricks that take getting used to if your muscle memory is geared to Firefox. The Safari online help is pretty good so you might want to poke through there as well.
Good luck on your new platform and feel free to ask your questions here.
I second the suggestion of using [link|http://fink.sourceforge.net|Fink] to get some nifty open source software. [link|http://darwinports.com/|Darwin Ports], a project to bring the BSD ports system to OS X is also pretty nifty. You can even have both installed without much conflict since Fink uses a different section of the file system.