To use handyPrint, which is the updated name for AirPrint Activator as of 2015, download and install the application. Turn on the AirPrint function and you can print from other Apple devices, such as the iPhone, iPad or iPod Touch, on a printer that's connected to the computer.
After you turn the AirPrint function on, it finds the connected printer automatically, whether the printer and computer are connected through a USB cable or a wireless network. The computer must be on for handyPrint to work. The computer's printer sharing setting must also be on.
To turn on printer sharing, go to the System Preferences, and click Print & Scan. Click Sharing Preferences, and on the window that opens, check the box next to Printer Sharing. Also, select the printer on the Print & Scan page, and then check the box next to Share this Printer on the Network. Exact printer sharing instructions may vary depending on the computer, but it typically follows these steps.
A download link for handyPrint and a list of compatible operating systems are available on Netputing.com. To download the application, visit the site's home page, and click handyPrint. Click the Download link, and proceed through the download process. The application has a free trial and then requires a minimum donation for continued use.