'Effect > Stylize > Rounded corners' not available in Illustrator CS6
Well the question pretty much sums it up. I'm running Illustrator CS6 on Windows and after selecting a shape and wanting to round the corners by going to
Effect > Stylize I'm looking for the option
All I'm seeing is "Glowing edges", and, well, that's not very helpful is it?
There are two sections in this drop down menu. You are looking at the bottom one (labeled Photoshop). The top one (labeled Illustrator) has the same stylize group, but with the effects you seek.