With the latest round of Firefox & MAC updates, many users are experiencing problems with Zebra printers and MAC. This has also been noticed on occasion with the Star receipt printer. To correct these issues, try the following steps:
- Uninstall Firefox.
- Restart the computer
- Install Firefox version 40.0.3: https://ftp.mozilla.org/pub/firefox/releases/40.0.3/mac/en-US/
- Set Firefox settings, per normal setup: http://support.mjfreeway.com/hc/en-us/articles/201576234-LABEL-PRINTER-Setup-and-Configuration