For best results on OS X, we suggest that you install your purchases using OS X’s built-in Font Book application. It’s very easy to use, and many times will just work automatically when you double-click the font software installer that you purchase and download from us.
While not common, Font Book occasionally displays warnings when you are installing new fonts. Typically, you can simply bypass these by checking an “ignore” box. (The warnings are not applicable in almost all cases.)