Add a new printer (+), wait 20-30 seconds and the Samsung ML-2010, Type USB Printer (usbtb) appears in the printers list, next to the usual Samsung ML2010, Type USB.If no printers are currently added, hold down the Control key while clicking in the box that appears above the '+' (Add printer) button, then choose Reset printing system… from the contextual menu. Hold down the Option key while clicking the '-' (Remove printer) button.Choose Print & Scan from the View menu.Choose System Preferences from the Apple menu.To use the Reset Printing System function in Lion, follow these steps:.Resetting the printing system in OS X Lion.If you can see the printer from printer list, make it default.Open the Applications folder -> Utilities, and Print Setup Utility.

Connect your printer to the computer via USB 2.

After the installation is finished, click Quit.* For a USB-connected 1.

Double-click the downloaded file on your computer.

Make sure that you connect the printer to the computer.

Install the official Samsung ML-2010 driver.

Download and install from the gutenprint page the two packages.The ML-2010 problem has been fixed for me Installing the usbtb usb backend for CUPS. Based on other now closed/archived thread:

Install samsung ml 2510 printer