I am using
Fontin as the font style and
XeLaTeX my document. In order to ensure every computer can display the font style correctly, I decided to re-export the document as PDF with Mac Preview so that all the fonts are embedded in itself (this trick indeed works!).
However, a new problem arises. In the re-exported PDF file, once I copy the text, many spaces are copied. But I can copy text in my original PDF file.
How can I fix this? Being able to copy text from my document is as important as embedding all the fonts.