Here's the deal, and you're not gonna like it one bit. =/ I have absolutely no way to provide equal functionality to Macs in a reasonable time frame. There is one workaround I thought of, but it involves redoing the whole thing and I'm not even sure it would work when I'm done -- since I have nothing to test on. It's literally flying blind.
From what I've read, there's a specific HTML (more specifically, style sheet) thing I used that isn't supported in Mac IE5.
I'm not entirely sure, but a better choice -- until I get a spare Mac -- might be to give Safari a try:
http://www.apple.com/safari/
Also, the browser based on the Gecko/Mozilla project may also be a good choice (again, I haven't tried any of these):
http://www.mozilla.org/products/camino/
I have *zero* idea how useful these products would be in relation to this site. But I do know they are free, and free means if you have some extra time, you might want to give them a try.
As for me, I'm going to go hit eBay and see how many organs I must sacrifice to purchase an old, beatup Mac. Don't worry, it's not just this, it's been sitting on my wishlist for a long time.
Does anyone know what the cutoff is for how ancient a mac can be to run osx and ie5?