Thank you so much zep516. I truly believe these machine have "senior moments". Went to use it and walah!!!! it worked. Thanks a lot.

It looks fairly typical. I copied the basic install but dont have that model so I cant give you any hints other than make sure its powered on when you snap them in and close the latch and dont forget to press the OK when it asks ... HP PDF says; Open the print cartridge door. Make sure the print carriage moves to the right. If it does not move to the right, turn the device off, then turn it back on again . - IMPORTANT: The device must be turned on to insert cartridges. CAUTION: Do not touch the copper-colored contacts or re-tape the cartridges. - Remove the tape from both cartridges. - Hold the cartridges with the HP logo on top. - Insert the tri-color cartridge in the left cartridge slot and the black cartridge in the right cartridge slot . - Make sure you push the cartridges in firmly until they snap into place . - Close the print cartridge door. - Press OK when prompted to confirm the installation of genuine HP print cartridges.

Google Best printer for iMac Joe

Have you tried all of these: Unsupported Cartridge Error in DELL printers (29/09/2009 @ 16:39:55) The "Unsupported Cartridge Error" message may be familiar to you if you are an unlucky dell printer owner. This message seems to be quite a common issue and is not confined to remanufactured inkjets but is just as big a problem with original Dell printer cartridges. It seems from looking on various websites and forums that this is a common problem with Dell inkjet printers and especially prevalent in printers such which take the M4640, M4646 and 592 printer cartridges (All In One 922, 924, 944 etc). Here are 3 ways to try and resolve your Dell Unsupported Cartridge error message. 1, Run the printer's clean cartridge printer cartridges function. This should be found within your printer's menu system. You can find a full description on how to do this on your Dell printer manual. You can find them at the Dell printer support website. 2, Clean the contacts on the top and back of the cartridge with filtered water (bottled water is great for this). Always use a lint free cloth so that the contacts will not pick up particles or fluff. 3, Download the latest drivers for your particular Dell printer. If you are up to date, it may be worth uninstalling your current driver and reinstalling a new one. You can find all Dell printer drivers here. ** Me again... Another suggestion I saw was to place the black cartridge in the colour cartridge slot, or vice versa.** Here is a link that might be useful: Dell cartridges