There is a program called WINE Bottler out there that has a self-contained version of IE. It's relatively easy to install. It looks kinda ugly -- at least, it did when I tried it about a year ago -- but it gives your Mac IE.
(Aside: the last version of IE for the Mac was 5.x. It doesn't run on anything past 10.3 or 10.4, IIRC.)
(Aside: the last version of IE for the Mac was 5.x. It doesn't run on anything past 10.3 or 10.4, IIRC.)