As the internet carrier has changed, the printer has to be connected to this new router.
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.
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.
Also, check with your Internet service provider if your router is able to forward 'Bonjour packets'.
Perform a ping test to check the connectivity
Obtain the IP address of the printer by clicking on the Wireless icon on the printer
On the MAC Go to Spotlight > search for Network utility > select Ping tab > enter the IP address of the printer in the box
Check the second box that says Send only > 10 pings
Click on ping > Check the results at the end if any packets are lost
Note: There should be 0% packet loss, share the results in your next post.
Hope this helps! Keep me posted.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".