Custom Map Makers

So whenever I have wanted to test my map I have had to make a pk3 file and pack it all the textures, shaders, etc. But I know you can open it straight from radiant. How is this done. I have tired building the map and typing the sv_ command in hurt, but the map won't open. What do I do?

in my urt dev folder I compile my .map to .bsp inside q3ut4/maps
then inside urt, I open console and type /devmap mymapname

so, for example, if I have a map ames.map in q3ut4/maps
this compiles to ames.bsp inside q3ut4/maps
then I do /devmap ames

easy

To run it directly from radiant you have to compile it in radiant, and radiants compile settings aren't always what you want.
And you don't have to pack it all up in a pk3. Use q3map for compiling and the game will launch as soon as compiling finishes.
Alternative (better) way is to use a batch file.

I think the problem is because q3map is a windows application and I am running osx

what I said works regardless of OS, it's also faster than launching from radiant (you can just leave your urt open, can even be already testing your map, recompile, then just console / up-enter reload)

What option do you use when you compile?
Its says my .bsp was compiled to the junk.text document

And what do you mean by urt dev folder?

I have an urt installation for mapping. This isn't required; you can use your normal urt install too. By dev folder I just mean wherever you compile your maps into bsps. I have no idea what you're talking about junk.text document. This is not a quake3 term and probably has nothing to do with urt or quake3 or bsps or maps. All you do is compile your .map to .bsp, make sure the .bsp is inside your urt/q3ut4/maps folder (or some subdirectory thereof) and go IN GAME and type /devmap nameofmap where nameofmap was the name of your bsp

Here is how I compile. I open net radiant. Open .map. click build and select one of the (test) options. Then in the terminal at the bottom of radiant it says: the build output will be saved in '/users/cbanks/.netradiant/ 1.5.0/junk.text'
When I open junk.txt it just has a whole bunch of text about textures and shader and what not as well as error messages

that's just talking about the build log, it has nothing to do with your actual map... where is your MAP?