During installation, you must select the active port. For USB connections, this is typically USB001 or USB002 . You can verify this in the Windows Device Manager .
: Many affordable thermal printers branded "iTech" utilize the industry-standard ESC/POS protocol. For these, a Generic ESC/POS Driver is often the most reliable option if a brand-specific driver isn't available. Step-by-Step Installation Guide
iTech’s official Mac drivers are often lacking in features. For "top" performance on macOS:
John selected the top result, the iTech TTP-250 Driver for Windows 10, and clicked on the download link. The file began to download, and after a few minutes, it was complete. John ran the installer and followed the on-screen instructions to complete the installation.