We have 4 new iMac computers in our office. We have installed and working perfectly a HP LaserJet 2015 and a HP LaserJet 1012. I have tried repeatedly to get my HP LaserJet 1150 to work. Initially, when trying to print, all three status lights on the printer would come on. I then downloaded the drivers from HP and the printer would work--with an error message but you could click "ignore" and the printer would go ahead and work. Then last week, I came in on Wednesday morning and the printer would work without the error message--it took some time to print but it was working. Then after an automatic software update, all I could get was the three solid status lights on the printer. Sporadically, it has printed but never consistently. I have tried all of the troubleshooting ideas including downloading of 3rd party drivers to no avail. The printer is listed on the Print/Fax list, it is listed on the options when you "print" from any application but, instead of printing anything, all three status lights come on and stay on. The HP Printer Utiltity does not recognize it. The printer works perfectly when connected to my old PC so I know it is not the printer. I called HP support but since the printer is four years old, we have to purchase support before they will tell us anything. I would appreciate any help offered.