I am sitting here just itching to update my 2 iMac 2011 computers. But am concerned about my HP 1606dn printer. HP was not very quick to issue drivers for Mountain Lion (not even sure they have yet) and the only reason it worked was that the printer was installed under Lion. Anyone having issues with HP printers and Mavericks? Might this be the same situation.. it's already installed and it will just work? Also have an Epson Workforce 545 that could potentially have an issue. And an old HP 2420, but I think that one just uses whatever driver Apple has installed. It does not seem to be too picky. Appreciate your thoughts and experiences with printers after upgrading.