I can't reset the wifi into my dekjet plus ink advantage 6475

[regizamov]

I can't adjust the wifi into my printer so I can't try the new inks I just installed.

[Max3Aj]

@regizamov, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
Here's a step-by-step guide to reset the Wi-Fi settings on your HP DeskJet Plus Ink Advantage 6475 and reconnect it on macOS 10.11 El Capitan:

 

HP DeskJet Plus Ink Advantage 6475 All-in-One Printer supports from macOS 10.12, we suggest you please update the OS. 
 

>HP DeskJet Plus Ink Advantage 6475 All-in-One Printer Software and Driver Downloads | HP® Support

Reset Wi-Fi on the Printer

You’ll need to restore the network settings:

• Make sure the printer is ON.
• Press and hold the Wireless button (📶) and the Cancel button (❌) on the printer at the same time for about 5 seconds, or until the Wi-Fi light starts blinking.
• This resets the printer's network settings to default (disconnected from Wi-Fi).

Use HP Smart (Alternative for macOS 10.11)

Try this:

• Download HP Easy Start from HP support page:
• HP Easy Start for macOS 10.11
• Run HP Easy Start, and follow the on-screen instructions to:
• Reconnect the printer to Wi-Fi
• Install the required drivers and utilities

Alternative Setup via Wi-Fi Direct (if Wi-Fi setup fails)

You can print using Wi-Fi Direct temporarily without a router:

• On the printer, press the Wi-Fi Direct button (it may be under the wireless icon).
• On your Mac, go to Wi-Fi settings and connect to the printer’s name (e.g., HP-Setup-6475).
• Once connected, try printing via System Preferences > Printers & Scanners, and add the printer manually.

You may refer to this document - HP Products - My operating system is not listed on HP Software and Driver Downloads | HP® Support

You can also, use Airprint - About AirPrint - Apple Support
AirPrint is a built-in printing solution for Mac, iPhone, and iPad. You can print from most apps that have a print feature.

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support