Steps to follow:
1 PC Instructions Open the Start menu and click the “Printers and Faxes” icon. This will open a window with a list of the printers currently installed on your computer.
2 Double-click the icon of the printer you want to go online. A pop-up window will open listing all the current print jobs queued by the printer.
3 Go to the printer in the menu bar of the pop-up window and uncheck the option “Use printer offline.” This action will change the printer from offline to online.
4 Instructions for Mac Open System Preferences, click on the icon in the Dock.
5 Go to the print and fax control panel in the Hardware category.
6 Select the printer you want to select from the list on the left side of the screen. Then click the “Open Print Queue” button.
7 Click “Resume Printer” at the top of the queue window to switch the printer from offline to online.