Here are a few things that you can do to solve the Epson printer is offline mac issue: First, make sure that your printer is turned on and connected to your Mac. Next, open System Preferences and click on the Printers & Scanners icon. Then, click on your Epson printer in the list of devices and click the Open Print Queue button. Further, click on the Resume button and then click on the Printer Setup button.Finally, click on the Use Printer Offline button to turn it off.