Which version of OpenGL to use?

Question

I currently run a machine that allows me to program in OpenGL 2.1. If I were to make a program, should I use the power of the current OpenGL versions like 3.x/4.x or use 2.1

Answer 1

Lots of embedded Intel graphics are limited to 1.4 or 1.5.

Mac OSX is stuck on 2.1 I hear.

All Radeon and GeForce cards can do 3+ (may need a driver update).

And you can program with any version, but if your hardware doesn't support it, you'll end up testing under a software renderer (slow!).