Then switch to the Ping tab, enter the site name, and send only 3 pings by clicking on the Ping button. If you do get an IP address back, make a note of it, as you will use it in the next steps. If you don’t get an IP address back, that means that the name is not recognised by the name service to which you’re connected, or you’re not connected to a fully-functional name server. This will use the name service (DNS) to retrieve its IP address. Enter the name of the website, such as, and click on the Lookup button. The first of its tabs which you should use is Lookup. But because it’s in a folder protected by SIP, you can’t even do that in the Finder. Why Apple now hides it away in /System/Library/CoreServices/Applications I just don’t know, and one simple remedy might have been to make an alias to it.
This is one of the most useful tools in macOS, as it combines easy access to eight powerful command tools in a single app. There are lots of ways to tackle this, but among the simplest is in Network Utility. Other sites work fine, and there’s no error message telling you why the connection failed, so you don’t know where your connection is falling apart.
The ethernet adaptor will also fail if the router is not giving out addresses on the wired LAN.It’s not uncommon to point your browser at a website, only for it to fail to connect. You could also resolve it by changing the router setup to hand out addresses via DHCP, but that requires admin access to the router, find the router manual & see how you enable DHCP on it. This covers how to share an Internet connection assuming you have the required cable & adaptor.
At least then his Mac would run DHCP & give your Mac an IP address to make internet routing work.
One thing you could do is share the internet connection from your friends Mac, but that would require a cable between the two computers. Nowadays this is non-standard networking setup & will make recovery mode fail. It does sound like your router is setup not to hand out DHCP leases - these are responsible for giving the Mac a local IP address. Rebooting the router may not hurt if you have access to that - but it will affect others on the network for a brief period. If you can use a wired ethernet connection if available. Internet recovery has limitations on the types of wifi network it will connect to if you have an 'open' network it may not show up…
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