Unable to access internet on Safari, after updating to macOS Sonoma on MacBook Air

You could try disabling all Safari extensions to see if that helps. If it does, enable them one at a time until you find the one blocking access. Then either delete that one extension or update it to the latest version.

It's a bummer to encounter internet access issues after updating to macOS 14.3 on your 2020 MacBook Air. Let's try to troubleshoot and resolve this to get your Safari browser back up and running smoothly.

Here are some steps you can take to address this problem:

1. Check Network Connectivity: First, make sure your MacBook Air is connected to the internet and the connection is stable. You can check this by trying to access the internet with a different application or browser. Since you mentioned that Google Chrome still works, it's important to confirm that your network connection is functioning effectively for other applications as well.

2. Restart Safari: Try quitting Safari and then reopening it. To do this, simply click on the Safari menu and choose "Quit Safari." Then, relaunch the application and try accessing websites again.

3. Check Safari Preferences: In Safari, navigate to the Preferences menu (Safari > Preferences), and then go to the "Privacy" tab. Here, you can click on "Manage Website Data" to delete any stored website data, including cache and cookies. Sometimes, corrupted cache or cookies can lead to browsing issues.

4. Reset Safari: If the issue persists, you can consider resetting Safari entirely. To do this, go to Safari > Clear History, and select "All History" to remove all browsing history. Additionally, you can go to Safari > Preferences > Advanced and select "Show Develop menu in menu bar." Once the Develop menu is available, you can click on "Empty Caches" to clear out cached website data.

5. Update or Reinstall Safari: Although Safari updates are typically included with macOS updates, you might want to check for any available Safari updates, or even consider reinstalling Safari if the problem persists. Reinstalling Safari can effectively reset the browser to its default state.

6. Check Security Software: Sometimes, security software or firewalls can interfere with web browsing. If you have any security software installed, ensure that it's not obstructing Safari's internet access.

7. macOS Troubleshooting: In case the issue continues, it's good to perform general macOS troubleshooting steps, such as restarting your MacBook Air, running Disk Utility to check for any disk errors, or even considering resetting the PRAM (Parameter RAM) or NVRAM (Non-Volatile RAM).

If after going through these steps you're still experiencing issues, it's worth reaching out to Apple Support or visiting an Apple Store or authorized service provider for further assistance. They may be able to conduct a more in-depth investigation to identify the source of the problem and offer a tailored solution.

I hope these suggestions help you in resolving the internet access issues you're experiencing with Safari on your macOS 14.3 MacBook Air.

Get rid of Bitdefender and any other security apps.

There are some users who believe Third Party Secure software is essential to protect macOS.

Buzzer please - wrong

There some of these same users ( not ALL but some " that tend to install and use Disk Cleaners and Disk Optimizer

Buzzer please - wrong

Part 1 of 2

There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 

The Operating System resides in a Sealed and Read Only Volume that can not be opened by the User nor by Third Party Applications.

Security. Built right in

Mac app security enhancements

 The Built in Security  is all that is required to protect the computer.

Part 2 of 2 and only if applicable

Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a portion on each sale. 

What the Application may do to the computer is up to the User to check this out before purchase

Any of the below should be removed as per Developers Instructions 

Disk Cleaner 

This will include CleanMyMac , aka “ BrickMyMac “

MacKeeper,

Dr Cleaner Pro Plus

Open Cleaner one Pro

Macmechanic

Clean my Mac x.

MacBooster

Specific to CleanMyMac aka “ BrickMyMac “

To put the CleanMyMac in context and the damages it may have or has already done.

This application can or will Muck Up your User Account ( Home Folder ) of this machine.

It does not touch the Operating System itself unless you consider your User Account ( Home Folder ) as part of the Operating System

Then in that specific context - it has Mucked Up the Operating  System 

This solution worked for me. 😁

https://discussions.apple.com/thread/255441109

Do you have any security apps, or VPN, or ad blockers installed?

No issues here using 3 different computers with Sonoma 14.3

Though, did notice this " I have Clean My Mac that has previously kept my Mac running without any issues but it has not offered any clues to any issues or problems. "

BrickMyMac aka CleanMyMac claims another victim

Any of the below should be removed as per Developers Instructions 

Disk Cleaner 

This will include CleanMyMac , aka “ BrickMyMac “

Specific to CleanMyMac aka “ BrickMyMac “

To put the CleanMyMac in context and the damages it may have or has already done.

This application can or will Muck Up your User Account ( Home Folder ) of this machine.

It does not touch the Operating System itself unless you consider your User Account ( Home Folder ) as part of the Operating System

Then in that specific context - it has Mucked Up the Operating  System 

Same problem here.

I have cleaned Safari Cache, quit, restarted, restarted MBP, check for permission issues via disk utility, nothing helps. I have two MBP (M1) on 14.3 and I am clueless what's going on with Wireless Internet (or perhaps even local network) access.

If I use a wired connection on the impacted Macs, internet works just fine and everything is good.

Other computers/devices in home works just fine on Wireless and get high speed internet access.

I'm having the same issue, M1 MacBook Air 2020. I don't use "CleanMyMac" or anything like it. I disabled extensions and have gone through a lot of troubleshooting issues. I am, at the same time, having another issue people have been mentioning the past few days where text that I wrote several paragraphs ago keeps displaying instead of the text that I actually just wrote. Sometimes it's in front of the cursor like an auto-fill but it's most often where I just typed, so it looks like I just rewrote a sentence I wrote awhile ago.

I'm working with tech support now, we've tried safe mode and deleting stuff from Finder>Library. Still no remedy to either problem.

Any solution yet? I updated to Sonoma 14.3 a few days ago. Haven’t used MacBook Pro since. Tonight, while it shows I’m connected to my WIFI, I get “no internet connection” messages from anything I try connecting with. Thx.

0Wishtobefree0 wrote:

5. Update or Reinstall Safari: Although Safari updates are typically included with macOS updates, you might want to check for any available Safari updates, or even consider reinstalling Safari if the problem persists. Reinstalling Safari can effectively reset the browser to its default state.

Would the user care to explain how exactly the OP can reinstall Safari ?

Please provide the Apple Support link that pertains to Reinstalling Safari on specifically, macOS 14 Sonoma

For that matter, how to update specifically Safari as a Standalone Update ?

We would be most interested

Sonama 14.3.1 is appalling. I cannot stabilise the connection to the internet. All other devices work well apart from my macbook. Do something quick guys... getting mightily sick and tired of this incredibly poor service...

Nah, I for one am not interested in what ChatGPT or Gemini says on this subject, I prefer to use my brain.