To edit the default settings for a printer on a Mac, you must edit your CUPS (Apple's printing software) settings. CUPS is the open-source printing system Apple uses that allows you to set up a printer on a Mac.
Before we get started, make sure you have already set up your label printer on your computer. Please see the following articles for instructions on how to set up your printer hardware:
Once you've confirmed your printer is added correctly in System Preferences, open your internet browser and type (or paste) the following link into your browser's address bar:
If you receive a "web interface error" that means your Mac is not yet configured to allow access to CUPS. You'll need to enable this option in the Terminal utility app. If you are able to access CUPS, skip the step involving the Terminal app.
Enable CUPS in Terminal
Open Terminal from the Spotlight Search in the upper righthand corner on the Menu Bar of your computer screen.
In Terminal, copy and paste the following command after the $ sign:
Then press Return on your keyboard:
Terminal will update with the following highlighted information:
That's all you need to do!
Quit Terminal and go back to your internet browser.
Type (or paste) the following link into your browser's address bar once again:
Set Default Options
You should now see a list of your printers.
Click on the printer you wish to edit. For this example, we are configuring the Zebra LP 2844:
Click the Administration drop-down menu and choose Set Default Options.
If an Authentication Required message appears, you'll need to enter your computer's username and password.
(If the password has been forgotten, you MUST contact Apple support: 0800 107 6285).
You should now be in General Options.
Change Media Size to match your label size. This example shows 4" x 6", but yours may be A6, 100mm x 150mm, or something similar.
Next, click Printer Settings at the top. Do not click Set Default Options just yet.
In Printer Settings, adjust the Darkness and Print Rate:
Print Rate: 2 inches/sec.
Then click Set Default Options.
Congratulations, you're done! You should now see a message similar to the image below.