Do you need to bring a photo for a Mexican passport at a U.S. consulate?
No print appears on the official checklists. Mexico’s passport regulation makes being photographed with the Foreign Ministry’s own devices a requirement, and the consulate takes the picture during the appointment, along with fingerprints, an iris scan and your signature.
Staff then print the OP-5 application with that data for you to review and sign. At consulates in the United States the passport can be handed over the same visit, valid for 1, 3, 6 or 10 years.
Sources: ordenjuridico.gob.mx · gob.mx