I use the HL-1440 under jaguar and dont really have any problems with it. Occasionall the printer que will mess with itself and I have to go into print center and restart it, but thats not really a big deal. One thing is this baby is quite temperature sensitive. I keep it next to my window, and if its freezing out, the printer will print as if theres really low toner, and you have to take out the cartridge and warm the bitch up.