hmm.... simple mapmaking for Mac
without coding?
Well, first of all, let me tell you: it's pretty simple to learn to make a maps through coding, and I prefer it a million times more.
If you check the wiki (http://my.bzflag.org/w/BZW) and look at just the introduction and some of the objects (box, pyramid, cone, arc, teleporter, base, etc.), I'm sure you'll have the hang of it in no time. 
It's actually just about as easy as placing objects with a mapmaker anyway, except you have
a lot more flexibility (namely the use of group objects).
However, if you're
really bent on using mapmaking software, you have a few main options:
Blender plugin is a 3d modeler and animation software (
http://www.blender.org/) that Teppic made a BZFlag plugin for. It's very, very functional, but it's definitely not simple. You could probably learn to code faster than use blender. The plugin has a few bugs to be resolved but nothing major.
Wings3d plugin I've never used wings3d to make a map, but I've heard great things about the interface. It's another 3d editor plugin, apparently much simpler to use.
iBZEdit is an
abandoned project that works well enough to use. It can be difficult at times, and it's got a few, large bugs, but it works for simple things. Again, it's really not all that easier than just making one with text, except it lets you preview your map as you go. (I do not recommend using this, as it is no longer in development, but hey... whatever floats your boat)
Really though, there is no doubt that learning to hand code maps will benefit you in the long run, and, even if you don't learn it now, you should definitely give it a try at some point.
. Also, i would like it to be very simple, for i do not really know coding. 
! I had thought that coding would actually be really hard. I guess not.