A little help for Mac users
I've been in hiatus from using EiffelStudio on the Mac for a while because since the upgrade to Leopard, EiffelStudio exhibited some strange behavior related to expose actions. As a result elements of the UI, that are custom drawn, went missing. I was left unable to see set breakpoints and the docked tool tabs. Thankfully help has arrived in the form of any update to XQuartz, part of the X11 adoption package, fixing the issues on the latest EiffelStudio port (and any previous, working, port for that matter!)
Thanks to Peter Gummer for finding this (read more about the issue here.) I'm now on my way to reinstalling EiffelStudio. As the Leopard "upgrade" did such a bad job of retaining stability I've had to start from scratch so the past few days have been spent reinstalling and reconfiguring everything.
During this time I came across some useful bundles for Mac OS X allowing you to configure environment variables and application associations like you would on Windows. They're free and are available from RubiCode.