I'm using an HP DeskJet 5550 with my new iMac. Works fine, except for one thing. The printer is set to turn on automatically when it receives a print job, and in fact it used to do so just fine on my Windows PC, still does so under XP in Fusion, and will also do so on the Mac side when HP's Mac utility/diagnostics program runs. However, it won't turn on automatically when the Mac sends it a regular print job. I'm using the latest HP Mac OS X driver. Any ideas? Thanks.