[Full List] 2020 Most Common macOS Big Sur Problems and How To Fix

Author Spencer Mcfadden By Spencer Mcfadden, on August 24, 2020, in macOS Problems | SOLVED

Summary: [macOS Big Sur Problems] Have problems with macOS Big Sur update? Your Mac not working properly after upgrading to macOS Big Sur? Check out our complete tutorial on macOS Big Sur problems and best fixes. Get Omni Remover Free >

Get Omni Remover

Best Mac App Cleaner

100% Free & Secure Download

macOS Big Sur (Mac OS 11.0) is the next major release of macOS for Apple Macintosh computers. As the successor to macOS Catalina (version 10.15), macOS Big Sur was announced at WWDC on June 22, 2020, with official public release scheduled for later in 2020 (App Can't Be Opened Because Apple Cannot Check It for Malicious Software.). So you may ask, what does macOS Big Sur mean? Why Apple named the new macOS as Big Sur? It is named after the coastal region of Big Sur in the Central Coast of California.

Common macOS Big Sur Problems and Fixes
Common macOS Big Sur Problems and Fixes

You may want to ask, WHAT's new in macOS Big Sur? Since the first release of the Mac OS X Public Beta in 2000, we are confidence to say macOS Big Sur is the biggest update, which includes macOS user interface redesign, taking advantage of Apple-designed ARM processors in future Macs and much more advanced macOS native apps (What Is Other On Mac Storage). As expected, every macOS update comes with a set of Mac glitches and malfunctions issues. So in this article, we collected dozens of most common macOS Big Sur Problems and best troubleshooting tips which may help you walk through this exciting macOS upgrade.

Best Free Mac Cleaner & Uninstaller

#1 Solution For Common macOS Big Sur Problems

Fix Up To 50+ Big Sur Software Bugs and Glitches

Smooth Your Way To Upgrade To macOS Big Sur

Get Omni Remover

Best Mac App Cleaner

Most Common macOS Big Sur Problems and Best Fixes 2020


Issue 1: How To Fix macOS Big Sur Mac Not Turning On Problems

macOS Big Sur Mac Not Turning On Scenarios (True Case): "My Macbook Pro suddenly shut down and is not turning on, no Apple logo or other sign of restarting. There was no exposure to water. (However, I had kept a steaming bowl of hot water right next to the laptop.But this was in an open kitchen). The Macbook Pro had less than 10% charge when it suddenly shut down. I charged it for another 10 minutes and tried to switch on, but no luck. I charged it completely till the magsafe indicator turned green, still does not turn on."

Fix macOS Big Sur Mac Not Turning On Problems
Fix macOS Big Sur Mac Not Turning On Problems

Common Reasons That Can Cause macOS Big Sur Mac Not Turning On Problems (Diagnosis): With the recent release of macOS Big Sur, one of the most frequently met Mac Problems that we heard from our users are the Mac Not Turning On issues. For instance, after upgrading to macOS Big Sur, some users may find their iMac won't turn on, MacBook Pro won't start up, or MacBook Air won't boot (How To Uninstall Programs on Mac). Based on our Mac Repairing experience, our certificated Apple Technicians suggest the following tips that may help solve your Mac Not Turning On issue.

How To Fix macOS Big Sur Mac Not Turning On Problems (Solutions):

  • Step 1 - Use Power Button On Your Mac: Long press the power button on your Mac (MacBook Pro/MacBook Air/iMac/Mac Pro). Every Mac has a power button, usually marked with a power symbol.
  • Step 2 - Check Mac Power Cable: It's a good idea to have a check on the power cable of your Mac to see if it works normally. It's also suggested to check the outlet by testing it with a lamp or other device.
  • Step 3 - Boot Your Mac in Safe Mode: To put your Mac into Safe Mode is easy. You can shut the Mac down and start it up while holding down the Shift key. Safe Boot can take a while to start (if it does work at all).

Issue 2: How To Fix macOS Big Sur Keeps Restarting Problems

macOS Big Sur Keeps Restarting Scenarios (True Case): "My iMac (Retina 4K, 21.5-inch, 2017) keeps restarting after updating macOS Big Sur, I need your help! I've tried using Disk Utility to repair the disk, didn't work, tried wiping disk clean using your Omni Remover and reinstalling data from backup, didn't work, is there something else I can do before i have to wait 4-6 weeks to have the Apple Store or a certified apple tech assist with this Mac Keeps Restarting after upgrade macOS Big Sur problem?"

Fix macOS Big Sur Keeps Restarting Problems
Fix macOS Big Sur Keeps Restarting Problems

Common Reasons That Can Cause macOS Big Sur Keeps Restarting Problems (Diagnosis): In most cases, an unexpected Mac keeps restarting issue (before or after macOS Big Sur upgrade) are caused by malfunctioning software apps installed on your Mac. You can check our dedicated article to find how to solve Mac app not working on macOS Big Sur issue. Also there are ways to check your Mac hardware glitches, like CPU or hard drive defeat, which is rarely met in our Mac Repair career. You can follow steps below to have a fix on your Mac keeps restarting issue after updating to macOS Big Sur.

How To Fix macOS Big Sur Keeps Restarting Problems (Solutions):

  • Step 1 - Check Malfunctioning Software Apps: If there are some rogue or unstable software apps installed on your MacBook Pro/MacBook Air/iMac/Mac Pro, Mac might ask whether you would like to move the app to the Trash. Follow this manual to learn how to uninstall program on Mac safely.
  • Step 2 - Check Mac Hardware and Third-party Devices: For some models of Mac computers, you can add extra RAM or SSD hard disk to boost your Mac performance. If so, have a check on these added hardware or devices.
  • Step 3 - Run the Apple Hardware Test: On starting of your Mac, Press Option + D keys to launch the Apple Diagnostics test.

Issue 3: How To Fix macOS Big Sur Wifi Not Working Problems

macOS Big Sur Wifi Not Working Scenarios (True Case): "Yesterday I was trying to upgrade my MacBook Pro from macOS Catalina to Big Sur, everything seems going smoothly until suddenly unable to connect to the internet anymore using my Wifi wireless connection on my MBP. It says it's connected to the wireless network and it's sends through a correct IP-address but when I try to visit a webpage using Safari, Chrome or any other browser it says the DNS-lookup has failed, every other application that requires a working internet connection on my MacBook Pro also can't connect to the Wifi internet."

Fix macOS Big Sur Wifi Not Working Problems
Fix macOS Big Sur Wifi Not Working Problems

Common Reasons That Can Cause macOS Big Sur Wifi Not Working Problems (Diagnosis): We have discussed several Wifi Not Working issues with iPhone/iPad and we are glad to expand our tutorials to macOS. Even though the Wifi model on a Mac is much more stable and reliable than on iPhone and iPad, we still get users feedbacks reporting on Mac Wifi Not Working issues, which might be on Wi-Fi but with no Internet connection. The reason of Mac Wifi not working issue could be down to your Wifi router, your Internet service provider, or your MacBook software.

How To Fix macOS Big Sur Wifi Not Working Problems (Solutions):

  • Step 1 - Forget/Reconnect Mac Wi-Fi Network: On your MacBook, go to System Preferences > Network > WIFI > Advanced > Click the Minus (-) button to delete/forget this Wifi network.
  • Step 2 - Run Mac Wifi Wireless Diagnostics: The macOS Big Sur and other recent OS X has in-built Wi-Fi connection Monitor tool. To do so: Press and hold Option (Alt) ⌥ key, then choose Open Wireless Diagnostics from the Wi-Fi status menu.
  • Step 3 - Modify Your Mac DNS (Domain Name System) Settings: If it's only the Safari or Chrome browser not connecting to the Internet, you can try to switch the DNS provider to a free public service like Cloudflare helps your Mac connect swiftly to the internet.

Issue 4: How To Fix macOS Big Sur Not Installing Problems

macOS Big Sur Not Installing Scenarios (True Case): "I am trying to upgrade my iMac from macOS Catalina to macOS Big Sur, but my computer says I'm up to date at Catalina 10.15.6. So I downloaded Big Sur beta profile. The Mac installed it on but with the black screen and the Apple logo, the installation won't move on. Does anyone has the same macOS Big Sur not installing issue?"

Fix macOS Big Sur Not Installing Problems
Fix macOS Big Sur Not Installing Problems

Common Reasons That Can Cause macOS Big Sur Not Installing Problems (Diagnosis): There are possible ways to troubleshoot common Mac Problems like macOS Big Sur unable to install issue. Several users told us their Macs get stuck in the middle of macOS Big Sur neither due to limited hard drive storage nor poor network. We collected a number of reasons and fixes that may fix your "The macOS installation couldn’t be completed" error.

How To Fix macOS Big Sur Not Installing Problems (Solutions):

  • Step 1 - Check If Your Mac Is Compatible with macOS Big Sur: Check your macOS version, Mac model, memory, and storage space to see if it's compatible and ready of macOS Big Sur.
  • Step 2 - Check Apple Server: If you can't complete the download of macOS Big Sur update file, you can have a try to see if the Apple Update Server is down.
  • Step 3 - Free Up Space On Your Mac: It requires about 6-8GB free space on your Mac to download the macOS Big Sur installer. Try to get as plenty of free storage as you can to ensure the smooth update.

Issue 5: How To Fix macOS Big Sur Finder Not Working Problems

macOS Big Sur Finder Not Working Scenarios (True Case): "My Finder tends to not responding after upgrade to macOS Big Sur and there are no documents on Desktop after downloading the new OS X. I've just upgraded my Macbook Pro (15 inch, mid 2009) to Big Sur and it is running slowly and my Finder keeps freezing at all and none of my documents are on my Desktop. How can I fix this issue?"

Fix macOS Big Sur Finder Not Working Problems
Fix macOS Big Sur Finder Not Working Problems

Common Reasons That Can Cause macOS Big Sur Finder Not Working Problems (Diagnosis): Finder is one of the most fundamental functions in macOS and plays as a dominant role in file manager. However, despite the Finder is the essential feature in all versions of macOS, there are still several cases where the Mac Finder stops responding at all. So in this complete macOS Big Sur Problems manual article, we can show you some tips that can help solve Mac Finder Not Responding issue.

How To Fix macOS Big Sur Finder Not Working Problems (Solutions):

  • Step 1 - Force Quit Finder and Restart: For both new and experienced users, the quickest way to troubleshoot Mac Finder not responding issue is to Force Quit and restarting Finder thoroughly.
  • Step 2 - Check 3rd-Party Plugins for Finder: Some Plugins/Add-ons/Applications might be useful for you but there are instances where they conflict with the system thus cause the malfunctioning of the Finder app on macOS.
  • Step 3 - Restart Your Mac: By restarting your Mac computer, it will reboot the macOS system so as to reset problematic settings.

Issue 6: Fix macOS Big Sur Stuck On Grey Screen Problems

macOS Big Sur Stuck On Grey Screen Scenarios (True Case): "When I reboot my Mac (I just update it to macOS Big Sur), I first get my login screen and enter my password. After doing so I get a grey screen with Apple logo and a loading bar which seems to show it loading only up to half way and then I'm stuck. I'm pretty sure I'm running OS X 10.11 or something similar to that. Please anyone who can offer assistance I'd be so grateful for."

Fix macOS Big Sur Stuck On Grey Screen Problems
Fix macOS Big Sur Stuck On Grey Screen Problems

Common Reasons That Can Cause macOS Big Sur Stuck On Grey Screen Problems (Diagnosis): Couple days ago, an old friend submitted his MacBook to our technicians and ask for a solution on its Mac Stuck On Grey Screen issue after upgrading to macOS Big Sur. We have also received several feedbacks on this Mac cannot turn on smoothly due to the grey screen, MacBook Pro stuck on grey screen with loading bar/circle slash/loading screen, or similar issues. You can have a try with the following troubleshooting tips.

How To Fix macOS Big Sur Stuck On Grey Screen Problems (Solutions):

  • Step 1 - Use Safe Boot To Restart Your Mac: In some cases, you can get your problematic Mac to start up successfully with a Safe Boot, and then restart it normally. It's the most easy and reliable way to fix macOS Big Sur Stuck on Grey Screen issue.
  • Step 2 - Remove External Peripherals and Devices: Try to remove external peripherals, printers, or other unnecessary devices for the duration of these steps unless otherwise noted.
  • Step 3 - Make Genius Bar Appointment: If you still can fix the Mac Stuck on Grey Screen issue after upgrading to macOS Big Sur, you can take it to your local Apple Store for an official fix.

The Bottom Line

Now can you fix your macOS Big Sur problems with our suggestions above? If you still have further macOS Big Sur software issues or bugs, feel free to contact us and we are happy to help. In addition, we will keep updating our macOS Big Sur Porblems list so that to cover all upcoming software/hardware glitches on your Apple devices.


MiniCreo / Mac Problems / Omni Remover / Most Common macOS Big Sur Problems

Omni Remover

Requirements: OS X 10.8+ , 13.1Mb free space
Version 3.3.1 (August 25, 2020) | Support macOS Big Sur | Category: Mac Uninstaller

More iPhone Problem Fixes and Tips

Tags: iPhone Data Recovery   iPhone Transfer   iPhone Fixes