connecting a wireless Lexmark printer

Assuming a Lexmark Printer works as any wireless printer, You need to connect it to your network, and as long as your iMac is connected to that network, when you go to print something, it should be there.

Additionally, you printer may make its own signal, if you connect to that, the password may be on the machine or the paperwork it came with, your printer will show up when you go to print.

Hope this helped 🙂

Hi

What OS are you using Mavericks, Yosemite or earlier version?

If Yosemite make sure your printer is supported.