HP LaserJet P2015 - Manual (Page 95)

When connected with a USB cable, the printer does not appear in the Print Center or Printer Setup Utility after the driver is selected.
Cause Solution
● Ensure that you do not have too many USB devices drawing
power from the chain. Disconnect all of the devices from the
chain, and connect the cable directly to the USB port on the host
computer.
● Check to see if more than two nonpowered USB hubs are
connected in a row on the chain. Disconnect all of the devices
from the chain and connect the cable directly to the USB port on
the host computer.
NOTE The iMac keyboard is a nonpowered USB hub.
Table 7-4 Problems with Mac OS X (continued)
ENWW Common Macintosh problems 85