I am unable to print from my OfficeJet Pro 7740. Looking for printer message.

[apr1272]

HO Office Jet Pro 7740

Message is " Looking for Printer :".  

[Kumar0307]

@apr1272, Welcome to the HP Support Community!

To assist you better, how is the printer connected to the Mac?

Check the connectivity.

If you would like to connect it wirelessly,

On the printer screen, go to Setup > Network Setup > Restore network settings

Go back to Network > Wireless > Wireless setup wizard and select your network.

• Make sure the printer and the Mac are connected to the same wireless network. Either 2.4 or 5GHz network.
• If you have a Dual-band router and both 2.4GHz and 5GHz networks share the same name/SSID, the printer will not be able to connect to the network. In this case, contact your Internet service provider to assign different names to both the networks.

Update the printer firmware

Click here to download and install the latest printer firmware from your Mac.

Click here to know different methods of updating printer firmware.

Also, check for any software updates on Mac

Click the Apple icon > About This Mac > Software Update and install any available update.

Perform a ping test to check the connectivity

1. Obtain the IP address of the printer by clicking on the Wireless icon on the printer
2. Open a new Terminal window (it's located in Applications > Utilities, or you can just start typing it in Spotlight).
3. Enter “ping” followed by the IP address of the printer. 
4. Press Return. Press ctrl C after 10 pings
5. There should be 0% packet loss, share the results in your next post.

Use the AirPrint option and check if that helps to print as shown in this document - Printing with Apple AirPrint (Mac)

Hope this helps! Keep me posted. 

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Have a great day!