All tax preparation and accounting software nowadays support the export to PDF format and H&R Block Tax Software (for both Windows and macOS) is no exception in this. You can use the default PDF export function to print tax 2014 forms as .pdf documents.
It may also be possible that other tax preparation or accounting programs may be able to import historical data from .t14 files and export them as PDF documents as well, i.e. basically achieve t14 to pdf conversion.
Updated: December 9, 2016