OS 10.3 is working fine with my HP OfficeJet d145 All-In-One printer/faxer/scanner beast. I did delete the old driver software (4.6.something) and downloaded the latest and greatest (4.7.5 I think) from HP's website. In fact, it seems to work much better than under 10.2 -- not real speedy, but it just feels better. Regards, Jim