Zebra GK420d Driver for my Mac - Zebra LP 2844 Thermal Printer

SOURCE: I am trying to clear

Hopefully you can read this. I downloaded entire manual from Zebra. This section is the feed button options to reset communications, calibrate, print configuration & also to do a factory reset. You will need to try the FACTORY reset. Basically while the printer is on you press & hold the feed button till it blinks 4 times in a row then release. It will blink 1 time then pause then it will blink 1-11 & pause then 1-11-111 then pause then finally 1-11-111-1111 then release. Each 1 represents a blink. I would attach the doc but system is too busy to allow right now.

SOURCE: how do I clear the memory on a zebra gk420d?

Download the Seagull scientific GK420 ZPL driver. Version 7.16.

Open the driver file, (Double click on printer icon in printer & faxes folder)

Click Printer, properties, tools, action, reset printer.

Play around with the Seagull driver, it is very useful, you can format memory, read files stored in printer memory, see forms, fonts, images etc.

The forms stored in the G series printers are not cleared by the normal methods which one would use on it's predecessor the 2844 models. The G series will maintain the forms stored in its memory even if you download new firmware, or reset it. This is actually a good thing, as it prevents you from accidentally erasing forms stored in the printer.

SOURCE: Zebra driver for mac

OS X 10.5.2 and above have built-in ZPL and EPL drivers. Plug the printer in to USB, go to System Preferences > Print & Fax, click + , and choose the Zebra driver. For the LP2844 you choose the EPL2 driver.

SOURCE: We have a Zebra GK420d

You can enter the internal web page and set the printer from there. Or from the printer driver, you can set the darkness and speed there.
Or in your label printer software.