It can be difficult to search for Macintosh answers on Google because people spell “Mac OS X” so many ways.  They use  “MacOSX”, “MacOS X”, MacOS-X and “Mac OS X”.  (“Mac OS X” is the official 3-word version according to Apple.)

To cast a wide net with Google searches,  you search for “mac-os-x” with your other search terms.  When you use dashes instead of spaces, Google is free to interpret them as either spaces or non-spaces.  It will find all of the variations I pointed out above.  You won’t miss the answer to your question just because you used a different variation than the person who wrote the answer.