Updated:20/05/2022

These are the most viewed FAQs, ranked by popularity.

1. 1.The message "[file name] can't be opened because it is from an unidentified developer." appears on OS X v10.8.x.
2. 2.How to identify your Operating System (OS).
3. 3.How do I print on envelopes?
4. 4.I cannot print from my computer via USB.
5. 5.Large characters are printed incorrectly. (Linux)