Best answer as chosen by user parchugas: Try this.
If you haven't tried it already, try this.
Enter your search term in the "Search CNET" box above and press Enter. In the new page, use the filters in the left hand column to filter your search down to just the Mac OSX forum.
Examples, if I search for PC with Mac OS? I get this
If I then click the filter for Mac OSX in the left hand column I get this;
Does that help?