I have the basic bukkit permissions for my craftbukkit and i cant create ranks because my mac doesn't open the .yml files what should i do
Set the default editor for YML files to TextEdit. VERY easy. Or just right click on the yml file and select "open as...", then choose TextEdit.
What battlekid said. Or, just use TextWrangler, which is a much better text editor. Place [SOLVED] in the front of your thread's title to mark it as solved.
