Hello I'm still new to Poser 6 (latest version is 6.0.2 118 under Mac OS 10.4) and I've been experimenting on a man poser's hair. I picked a style and did a test-render to see what it looks like. Upon the beginning of the rendering the shadow map for Light 1, I had a spinning beachball that went forever and I checked the Force Quit box, it said Poser 6 not responding. I had to force quit twice upon that situation. What gives? Any advice? Thanks.

What hair style was it? A "strand-based" style or a "transmapped" style? "Strand-based" will take quite a bit longer to render.
Rendering always takes time. How much, that depends on the complexity of the scene and the speed of your computer. If it's transmapped hair and a modern machine, you can make yourself a cup of coffee while it renders.
If it's strand-based and an older G4 or G5, you can travel to Columbia and pick your own beans while it renders...

A lot depends on render settings. The "maximum quality" setting of Poser 6 will result in insufferably slow renders and often in renders that can't complete due to excessive memory requrements.

If you want to get a quick impression, choose the Poser 4 renderer. You'll lose a lot of advanced effects, but the render will be fast, even on a slow machine. Use Firefly when you're ready for the final high-quality render.

Strand-based style, it came within Poser 6. I have a G4 1.25 GHZ, with 1.25 GB of RAMs. I was in the Hair Style Room of Poser 6 where I had a problem with the long rendering focusing on the hair and head of a man. Would Daz Studio program help with rendering? Thanks!

Nope.
DAZ Studio is an alternative to Poser. It does not support strand based hair or dynamic cloth. It's got a good render engine though, and it can use most Poser content.

If you want to test render, I seriously recommend using the Poser 4 renderer (choose Render-Render Options, tab Poser 4 renderer.) For speed, you can uncheck Anti-aliasing. Should render within a minute, even on an older machine.

And if you want to use the Firefly render engine: always, always use the Manual options. Turn down the maximum texture resolution to a power of 2 that closely resembles the largest dimension of your render (for example, if you're going to render to a 1000x750 px image, choose a maximum texture resolution of 1024), set the minimum shading rate to 0.5 (lower it if the render gets grainy), uncheck texture filtering, and only enable raytracing when you use raytraced shadows or reflections and refractions. 

You can save the settings as a preset from this screen, I higly recommend doing so.

Hope this helps,

Steven.