To fix the issue of the hp 2600 printer offline in mac, follow these steps: • Open the main menu to select the" System preferences" • Then, select the "Printers & Scanners" option. • Then, right-click on your printer to select the "Reset Printing System" option • Fill in the username and security key of your Mac computer. • Click Ok. • Wait for a while for the list of printers. • Select the" plus" button and "add a printer or scanner."