This is a quick terminal tip for those using iTunes. Within iTunes you can normally give whole star ratings to music. This little tip will allow you to give half a star. So you can give 3 and half stars. If you hate a song that much you can also give it only half a star. It is a simple terminal trick which involves using Terminal to change a preference.
Open terminal within Applications > Utilities. When open copy and paste the following command and hit enter.
defaults write com.apple.iTunes allow-half-stars -bool true
Now when you select a star rating and drag to the right or left you can add half a star. You can still do the whole start ratings.
If you want to remove this command, within terminal again copy and paste the following:
defaults write com.apple.iTunes allow-half-stars -bool false
iTunes will need to be restarted. Any existing half star ratings will be lost and it appears the value rounded down to the nearest star.