HP LaserJet Pro M521 Multifunction Printer series - Manual (Page 246)

Remove software (Mac OS X)
You must have administrator rights to remove the software.
1. Disconnect the product from the computer.
2. Open Applications.
3. Open Hewlett Packard.
4. Open HP Uninstaller.
5. Select the product from the list of devices, and then click the Uninstall button.
6. After the software is uninstalled, restart the computer and empty the Trash.
232 Chapter 9 Solve problems ENWW