I'm selling templates online and I was wondering if I could use the typefaces I already have on my computer (Mac) or the ones that come with Adobe CC? Thanks in advance, Julien
You can use the fonts in a template. You can not give away font files.
What that means is anyone who opens the template and does not have the font will get a "missing font" warning or the font won't display correctly.
Almost every commercial font license prohibits the sharing, selling, or otherwise distributing the files associates with the font itself.