Foxit PDF Editor for Mac still doesn't support converting the fonts used for the texts in PDF files into embedded fonts yet. However,you could choose to use the "Convert Text Objects to Shape Objects" this feature to convert selected text object(s) into path(s), which will meet the pre-press requirement. For those computers that do not support or display certain fonts, this new feature helps to overcome that issue.
To convert text objects to shape objects, select the text objects, and do one of the following:
1:Click Edit in the Ribbon > Edit Object, choose Text from the drop-down list, please single click on any text object on the current page to select it, then press Command + A to select all the text objects on the current page.
2: Right-click the selected text objects on the current page, and choose Convert to shape object.
3:Click the Convert to Shape icon in the Split group in the right Format panel.
4:Then refer to Step 1 to Step 3 mentioned above to convert texts on other pages of the file page by page.