A:AnswerGood question. This printer has a 1 year limited manufacturer's warranty. You can also get Geek Squad Protection on this printer for an accidental damage protection.
I hope this helps.
A:AnswerGood question. Yes, this printer is compatible with El Capitan. You just have to add the printer to the computer from System Preferences after adding the printer to your WiFi network. You can also use a USB printer cable to hook it directly to the computer to install the printer driver.
I hope this helps.