macOS 11 Big Sur Problems-How to Fix the Most Common Issues

Since macOS Big Sur was released to the public, we’ve heard about several bugs and errors that come with it. While some issues might require Apple’ official fixes , you can deal with pretty much all of these yourself. So, here is how to fix the most common macOS 11 Big Sur problems.

How to Fix macOS Big Sur Download & Install Problems

macOS 11 Big Sur problems

Many people ran into download problems when trying to install macOS Big Sur right on its launch day. Even though Apple’s server seems to be okay, downloading the new macOS update is quite difficult for some users. In fact, “lost connections” and “slow download speeds” are the most common problems when it comes to macOS update.

So, if you encounter these download issues, try using an ethernet cable instead of Wi-Fi. This will stabilize and speed up your download process significantly. On the other hand, if you can’t plug in or it doesn’t work, we suggest you restart your router and your Mac. Here is a more detailed guide to fix macOS Big Sur download and install issues.

How to Fix macOS Reinstallation Errors on M1 Macs

Shortly after the launch of the new M1 Macs, users have reported a few macOS reinstallation errors on M1 models. As a result, these machines are non-functional after the macOS update.

Luckily, Apple just posted a support document for users who are experiencing this issue. It seems like the problem only occurs if you erase or restore your M1 Mac right away before upgrading to macOS Big Sur 11.0.1. 

In the document, Apple suggests creating a bootable installer using another Mac. Otherwise, there is a step-by-step Terminal guide to help you restore your Mac to a functional state. Either way, you should be able to use macOS Recovery normally when reinstalling the new macOS update afterward.

How to Fix macOS Big Sur Bluetooth Issues

Unfortunately, the Bluetooth connections might get affected after installing macOS Big Sur. Luckily, there are some troubleshooting for you. Let’s start with turning your Bluetooth off and on again. And, if that doesn’t work, try this:

  1. On your Mac, click on the Bluetooth icon in the upper right of the screen.
  2. Open “Bluetooth preferences“.
  3. Disconnect all devices that are now paired with your Mac.
  4. Then, start the pairing process again.

However, in case none of that works, our plan B is delete the Bluetooth.plist file. No worry, it’s totally safe. Follow these steps do it:

  1. Go into Finder.
  2. Click on Macintosh HD.
  3. Then, open the Library.
  4. Scroll down and open Preferences folder.
  5. Here, you will see 2 files called “” and ““.
  6. Delete both files.
  7. Reboot your Mac and try your mouse again.

How to Fix macOS Big Sur App Problems

App developers are still rolling out updates to its apps in an attempt to stabilize the overall performance. So, make sure all of your apps are up-to-date. If your Mac apps still don’t work, the best way is restart your Mac, then delete all problematic apps, and download them again.

How to Fix macOS Big Sur Performance Issues

macOS 11 Big Sur problems

If you feel like your Mac is slower than usual right after installing macOS Big Sur, you aren’t alone! In this case, you should wait for a couple of days or restart your Mac to see if the software performance improves first. Then, if your Mac is still slow, you might need to do a Clean install. This can have a tremendous impact on your Mac’s performance.

How to Fix macOS Big Sur Touch ID Problems

Apparently, even the Touch ID isn’t an exception here. Before you do anything, you need to update your fingerprint now. Here is what you should do. Open the “System Preferences” and go through the fingerprint setup process again. However, if re-adding fingerprint doesn’t work, the next option is to reset your Mac’s SMC.

How to Fix macOS Big Sur Mouse Issues

If you’re facing this bug, be positive because this isn’t a hardware issue. And, you only need to delete some files in order to fix it. Here is how to fix macOS Big Sur mouse issues:

  1. Go to Finder.
  2. Click on Macintosh HD.
  3. Open Library.
  4. Scroll down and choose the Preferences folder.
  5. Find a file called “
  6. Then, delete this file.
  7. Finally, reboot your Mac and try reconnecting again.

After all, if none of the above methods works, it’s a good idea to downgrade to a more stable macOS version and wait for Apple’s performance patches.

What issues you’re experiencing after installing macOS Big Sur? Let us know in the comments!