Did you go to the App Store and check for Updates?
Yes they do see here:
MF Printer Driver & Utilities for Macintosh V10.5.1 [Intel : Mac OS X 10.5/10.6/10.7/10.8/10.9/10.10/10.11]
If you are satisfied, please kindly provide an OK or Above Rating - so I get paid. Please remember we only get a portion of the original amount you pay no matter how long it takes, so bonuses are GREATLY appreciated. Keep in mind you can always come back to this page at any time regarding this question. Thanks!!
Sorry I never heard back from you did that driver work for you?