12 Fixes Mac Safari Running Slow after macOS Big Sur/Catalina Update: Speed UP Slow Internet Connection on Mac, MacBook

Last Updated on Dec 28, 2020

Oh, Safari Running Slow or safari slow after Big Sur/Catalina update? Apple user has one of the finest web browsers that is Safari. Apparently, there are more users of Google Chrome are available in the market compared to Apple’s Safari. However, the reason behind this is, the person who has Mac or iPhone faces any problem in Safari, they move to Google Chrome.

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Instead, they should try to fix Safari complications like Safari running super slow on macOS Big Sur/Catalina or Mojave, Safari won’t open, Safari won’t load a page, browsers not working after update, safari not loading on MacBook, and more. There is a way through which you can get solutions to all these problems. So let’s get started with them to Speed up a slow internet connection on Mac.

Top 12 Tips to Fix Safari Running Slow on MacBook, MacBook Pro/ Air

Solution 1: Clear Cache, Extension, History

Problems with safari after an update? Let’s see a solution- If your day begins and ends with Mac and Safari, then you probably should clear cache, extensions, and history periodically. They simply eat your Mac’s storage and slow down the Safari. It is worth deleting all this and makes some space.

  • Step #1: Open “Safari”.
  • Step #2: Click “Preferences” and open “Advanced”.
  • Step #3: At the bottom click to enable the “Show Develop Menu in Menu Bar” menu in the menu bar.
    Empty Caches of Safari from Finder

    Empty Caches of Safari from Finder

    • Step #4: Head over and click on Develop > “Empty Caches”.
    • Step #5: Now, again click on “Disable Extensions”.
    • Step #6: Go back to the “Safari” menu and click on “Clear History” instead of Preferences.

Solution 2: Disable Plug-Ins too

Undoubtedly the Plug-ins can also reduce the loading speed of Safari.  Though they are designed to work with Mac and Safari, if you are unlucky then a bug may hit at your doorstep. In that case, disable the Plug-Ins if any of them are of no use.

  1. Go to the Safari app, click on the Safari option.
  2. Then, select Preferences.
  3. Click on the Websites tab.
  4. Scroll down the Sidebar, under the Plug-ins section, uncheck if you see plugins.

Solution 3: Manually Clear Cache.DB file

The above solution must work properly, but if in case anything goes wrong or the cache isn’t deleted then try this one.

  • Step #1: Open the “Finder” widow on mac.
  • Step #2: From the top Menu Click “Go” and then click on “Go to Folder…”.
  • Step #3: Enter the below command and click on Go button,




Clear Safari Caches on Mac

Clear Safari Caches on Mac

  • Now as soon as the folder opens click on the .db file and move to trash.
  • That’s it.

Note: Before performing this action close the Safari app.

Solution 4: Disable/Uninstall Safari Extension on Mac

An outdated or Unsupported safari extension installed on your Mac gives a slow browsing experience. So, I recommending disabling Safari Extension or Update Pending updated from Mac App Store. Based on past experience, Some Extensions unable to load websites like youtube on a normal browser, but Private browsing allows to open websites. Because installed Extension will not load on Private browsing. That’s proved you have a problem with Extensions.

  1. Open Safari on Macbook Mac computer.
  2. Now, From the top menu Safari > Preference.
  3. Then, Go with the Extensions tab and Find all installed Extensions.

    Uninstall or Remove Extension From Safari on Mac

    Uninstall or Remove Extension From Safari on Mac

  4. Deselect the Extension in front of the name from the first left panel, So the Extension will be disabled. Next, we can uninstall from there as well.
  5. That’s it.

Read more: Tips to Speed up Slow Mac after big Sur update

Solution 5: Update macOS to Speed up internet on Mac

If you haven’t updated macOS, then you might face several issues. The new update contains all the bug fixes probably it will also include Safari. So update MacBook to the newest version, if available.

  • Step #1: Open the “Mac App Store” and check for the updates.

Solution 6: Disable Dashboard Off

We can’t say it will be a proper solution for your Safari running slow on MacBook Pro, Mac. But I have seen some people Safari issue has been solved by disabling dashboard.

  • Step #1: Open the “Apple” menu and click “System Preferences”.
  • Step #2: Click on “Mission Control”.
  • Step #3: Turn off “Dashboard”.

Solution 7: Change Search Settings in Safari on Mac

All the time we are accusing Safari of being slow, but every time it isn’t possible. There is a possibility that the search browser you are using is facing situations, and so Safari running slow on macOS Catalina, or Mojave. If this is the problem, then we can fix it by changing the search settings.

  • Step #1: Go to the “Safari” app and open “Preferences”.
  • Step #2: Click on the “Search” tab.

Try to change the search engine to Bing. After that restart the Safari and observe that the issue is fixed or not.

Solution 8: Change Network Service also works to Speed up internet on Mac Catalina or Mojave 

If you have connected Mac to Wi-Fi as well as Ethernet, then it can be a reason behind the slow performance of Safari. Remove on one network connection and observe if it has any effect on it.

By default, Mac will give priority to only one network. But if you want, then you can change the order of the priority and switch connections.

Here’s how you can change the priority of the network service

  • Step 1: Open the “Apple” menu and click on “System Preferences”.
  • Step 2: Next, click on “Network” and then open the “Action pop-up” menu.
  • Step 3: Select “Set Service Order” and arrange the network service by dragging them.
  • Step 4: Click “OK” and “Apply” changes by clicking on it too.

Solution 9: Remove Preferences File

We can take our chances to fix Safari running slow on macOS Big Sur by this solution.

  • Step 1: Click on “Finder” and tap on “Go”.
  • Step 2: Next, click on “Go to Folder”.
  • Step 3: Enter the path,
  • ~/Library/Preferences

Now locate the com.apple.Safari.plist and Remove it. Then restart your Mac so after power on the file come back automatically and the browser will load fast.

Solution 10: Change DNS Settings

By default, our DNS settings are provided by ISP. Instead this time we will try to use public DNS which might boost up Safari. The best DNS server is Google DNS, probably everyone including me is using Google DNS.

  • Step #1: Click to open the “Apple” menu and then open “System Preferences”.
  • Step #2: Open “Network”.
  • Step #3: Select the network on which your MacBook is connected.
  • Step #4: Click on “Advanced”.
  • Step #5: Now tap (+) and add a DNS server.
  • Step #6: and are the Google DNS servers for you.

Solution 11: Change Login Account on Mac

Another weird solution for this issue is to change the user account. Create a new account and try to use Safari, see if anything changes.

Besides we will use Disk Utility to fix this issue. Search Disk Utility from the Spotlight.

  • Step #1: Once “Disk Utility” is an on-screen tap on Hard Drive of Mac.
  • Step #2: Now, click on the “First Aid” tab and click “Run”.

Solution 12: Reinstall macOS Big Sur/Catalina

Unfortunately, if none of the above work for you then you have to follow this the extreme path. Other than Safari if you are facing any problems in Mac or MacBook, then it will be fixed with this troubleshooting. Get here how to Reinstall macOS Big Sur/Catalina.

Do you find any other trick to fix Safari running very slow on Mac after an update? Let me know in the comments!

Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [email protected] [OR] [email protected]

  1. “However, the reason behind this is, the person who have Mac or iPhone they face any problem in Safari, they move to Google Chrome.

    Instead, they should try to fix Safari complications”

    No, they should use whatever works. Safari has no excuse, I’m sorry.

    PS: Yes I miss the handover and shared ios macos tabs too… but, a non-functional browser is a non-functional browser…

    PS2: I am still wasting time with relogins from your fist solution… So you say I should reinstall Mojave… when there are other browsers that work just fine… again: looool

  2. With Windows 7, Google was fast downloading. I have recently switched to an iMac and have been driven mad by the slowness downloading web pages – sometimes it sticks part way through and I get nothing. I switched to Bing – that was as slow. In desperation I tried DuckDuckGo. Pages are downloaded instantly. I have no idea why, but it work, so I’ll stick with it.

  3. Solution 10: how do you reinstall Mojave?

  4. For your information, I have restored Safari normal speed on Catalina by deactivating my Intego Netbarrier suite

  5. I upgraded my MacBook Pro to Catalina a couple of weeks ago and all was good. Today I upgraded my MacAir and I basically can’t connect to the internet using the wifi that I used before to download Catalina and the same wifi that I am using on the Pro to find your website and to send this message. I tried deleting the cache and reopening Safari and restarting but still nada.

    What’s up with that?

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