Epson printer offline mac is a fairly common error and is easy if one understands the problem cause. It can easily be solved by simply resetting the printer by following the steps given below:

1. Select "System Preferences" from the drop-down menu under the "Apple" menu.

2. Select "Print & Scan".

3. In the Printer list, simultaneously press the "Ctrl" key and right-click. Select "Reset Printing System" from the drop-down menu.

4. If your printer displays, pick it with the "+" button; otherwise, click "Add Printer or Scanner." Click "Add" after selecting your printer from the list. Allow time for the printer to download and install before using it again.