A: Run the built-in troubleshooter: Settings > System > Troubleshoot > Other troubleshooters > Printer. Also, check that no other printer is set as "Default." Right-click the iWear BP429 in Control Panel > Devices and Printers and select "Set as default printer."
Sometimes the driver downloads as a folder of .inf, .sys, and .cat files without an installer. Here’s how to handle those: driver printer iware bp429 download upd
Note: macOS often requires disabling SIP (System Integrity Protection) for certain thermal printer drivers. This is not recommended for casual users. A: Run the built-in troubleshooter: Settings > System