How to fax from a Mac

The straightforward route: send from the browser

1. Open faxbolt.com in Safari or Chrome and click Send a fax.
2. Drag the PDF onto the upload area, or click to browse. JPG and PNG work too.
3. Type the recipient's fax number.
4. Add a cover sheet if they expect one, then check the summary and send.

Nothing to install and nothing to configure — the fax call happens on the service's side, which is why this works the same on an M-series MacBook as on an old Intel iMac.

Preparing the file on a Mac

• Pages, Numbers and Keynote: File → Export To → PDF. Do not fax the native file; it has to be converted anyway and conversion is where layouts drift.
• Word or Google Docs: export to PDF for the same reason.
• Paper documents: scan with a connected printer through the Preview app (File → Import from Scanner) at 200–300 dpi, black and white.
• Continuity Camera: right-click in Finder → Import from iPhone → Scan Documents. The scan lands on the Mac as a PDF.
• Check the finished PDF in Preview before uploading — the receiving machine prints exactly those pages.

If your office has a fax-capable printer

Install the manufacturer's driver and the printer appears twice in the print dialog: once as a printer, once as a fax device. Choose File → Print, pick the fax device, and the driver asks for the destination number. This only works if an analogue phone line is plugged into the printer — the fax card by itself does nothing.

What no longer works

• The built-in Fax PDF option in the print dialog: removed with modem fax support.
• USB modems: even where a driver exists, macOS has no fax stack to drive them.
• Bluetooth to a phone: phones have no fax hardware either.
• AirPrint to a fax device: AirPrint prints; it does not dial.