2 Answers. 2. 24. The fonts name is Menlo and it comes with OS X.

What is the font used by Apple?

After two rocky years as Apple’s typographical identity, Helvetica Neue is being replaced by a bespoke font, San Francisco, as the default font on both OS X El Capitan and iOS 9 this fall. San Francisco is the first in-house typeface Cupertino has designed in more than 20 years.

How do I add fonts to Xcode?

To add a font file to your Xcode project, select File > Add Files to “Your Project Name” from the menu bar, or drag the file from Finder and drop it into your Xcode project. You can add True Type Font (. ttf) and Open Type Font (. otf) files.

You can use the following:
Press xcode->preferences.select fonts and colors.select ANY font in the list and press cmd+a (select all fonts)select font size for all editor fonts at the bottom of the window.