MacBook Pro Wi-Fi connects but has no internet access

If its a DNS related issue, try clearing the DNS Cache:

This process forces your Mac to fetch fresh IP address data from DNS servers, which can fix problems like websites failing to load, incorrect site redirections, or inability to access previously visited sites.

To clear the DNS cache on macOS Big Sur (and other modern versions like Tahoe, Sonoma, Ventura, Monterey, Big Sur, and Catalina), you must use the Terminal application. 

> Open Terminal by pressing Command + Space, typing "Terminal," and pressing Return.

> Copy and paste the following command into the Terminal window:

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

> Press Return. You will be prompted to enter your administrator password. 

Note that no characters will appear on the screen as you type the password. 

> Press Return again to execute the command.

There is no confirmation message displayed upon success; a new command prompt line will simply appear. Websites may load slightly slower initially as the Mac rebuilds the cache with fresh data.

You can also test DNS on your MAC:

> Ping 8.8.8.8 on macOS, open the Terminal app and type the following command:

ping 8.8.8.8

> Press Return to start the test. 

The command will continuously send packets to Google's DNS server to measure latency and packet loss. To stop the ping, press Control + C.

By far the easiest way to cause poor performance, instability, overheating and crashing is to install ANY third-party speeder-uppers, Cleaners, Optimizers, Third-party Virus scanners, Bit Torrent, or a VPN that you installed yourself. 

if you have none of that installed,

Launch a browser and enter this easy to remember all-numeric IP address:

1.1.1.1 

in the address bar,  and press return.

If you get the CloudFlare** splash page, or more recently, a web page with the Words [NOT an error message]

‘Not Found’ followed by a come-on to “switch to 1.1.1.1” services, your internet is working, but DNS lookup may not be working.

**CloudFlare is NOT part of the solution, they just own the easiest to remember all-numeric IP Address (does not require a DNS lookup.)

Shut down all devices and reboot one at a time, and compare your results (?)

modem

router

Mac

If you are connected to WIFI you can on the fly refresh the DHCP Lease and compare your results.

and/or you can change your DNS sever or rearrange the priority list as a test..

ex.

AryanMacCB wrote:

No doesn't work

Did you look at Service order... remove all but WiFi (?)

Recently from past few months I have been facing issue of wifi connections the issue is that when I connect to wifi it shows the wifi is connected but there is no sight of internet

This could well be an associated hardware issue....

re: < Mac Book Pro late 2013 retina>

see Vintage and Obsolete:

Vintage—Apple will repair if parts are available; Obsolete—no.

Obtaining service for your Apple product after an expired warranty - Apple Support

Also see Apples official Support page:

If your Mac isn't connecting to the internet over Wi-Fi - Apple Support