The Mavericks user license states:
E. Fonts. Subject to the terms and conditions of this License, you may use the fonts included with the Apple Software to display and print content while running the Apple Software; however, you may only embed fonts in content if that is permitted by the embedding restrictions accompanying the font in question. These embedding restrictions can be found in the Font Book/Preview/Show Font Info panel.
I'm presuming you already know this, but just wanted to be sure.
As danegeld noted, rarely does a font prevent you from embedding them. As long as it goes, you're very likely okay.
As an example with a PDF, the default is to subset fonts. Meaning, if there is no W anywhere in the text, it will not be included in the embedded font. So embedded fonts are incomplete to start with. That, and extracting a font from a PDF is, by design, pretty much impossible. That way, no one gets free copies of commercial fonts from the documents you send out.