Celestia Forums

I am new to Celestia and I am having trouble with installing addons. I have a Mac OS X. Every time I try to edit/change something in Celestia Resources it tells me that it can not be modified which means I cant add files or replace files. Perhaps I am just doing it all wrong. But it seems as if I am following the installation instructions correctly. I also noticed two different versions of the Celestia Resources folder. One is located in the application support folder and contains only two folders (extras and scripts) which are empty. The other version (the one that cant be modified) can be found on my computer by pressing Control and clicking on the Celestia icon and then clicking on "show package contents" and then contents to resources and then finally to Celestia Resources. My main question is simply how to modify this folder.