Apple Inc. recently released its new MacOS version called MacOS Big Sur. According to the developers and Apple device users, the Big Sur was the most awaited software update for them. However, many Mac users have faced MacOS Big Sur Installation Failed issues while updating their Mac computer system.
What is MacOS Big Sur?
The MacOS Big Sur is the 17th and latest operating system provided by Apple. The MacOS 11 (Big Sur) was announced on June 22, 2020 and it was officially released on November 12, 2020.
What’s New: Should You Upgrade to MacOS Big Sur?
The MacOS Big Sur contains some amazing features which are mentioned below:
- Updated Menu Bar
- Floating Dock
- New Icons for Apps
- Lighter Window Appearance
- Redesigned Sheets
- New and Updated Sounds
- Full-height Sidebars
- New Symbols throughout MacOS
- Customized Control Center
- Updated Notification Center
- And Many More Changes
In order to enjoy all these new features, you have to update your Mac PC or MacBook device to the latest MacOS Big Sur.
MacOS Big Sur Compatible Mac Devices
The Apple Inc. has released the official MacOS Big Sur operating system for various Mac PC and MacBook devices. Here we provide the list of MacOS Big Sur compatible devices as under:
- MacBook (2015 or later)
- MacBook Air (2013 or later)
- MacBook Pro (Late 2013 or later)
- Mac mini (2014 or later)
- iMac (2014 or later)
- iMac Pro (2017 or later)
- Mac Pro (2013 or later)
You should have any of the above Mac devices to upgrade it to MacOS Big Sur version. You can check if your MacBook is one of the compatible versions by click on “Apple Menu” and select “About this Mac” option. If your Mac is not any of the above listed devices, you should check its hardware information and verify if it matches with the following.
- MacOS X 10.9 or Later
- 4GB of Memory
- 35.5GB of Available Storage on MacOS Sierra or Later
- Some features require your Apple ID
- Some features require a compatible internet service provider
If your Mac PC or MacBook device meets the above requirements then you can upgrade it to MacOS Big Sur system.
MacOS Big Sur Installation Failed Issues: SOLVED
The MacOS Big Sur (Version 11) was rolled out on November 12, 2020. Hundreds of Mac users across United States and other places have faced problems in downloading and/or installing the Big Sur operating system.
Among all the MacOS Big Sur installation failed issues, one common issue was “An error occurred while installing the selected updates.” Now, we are going to show you different installation failed errors/issues faced by the Mac users and their solutions.
MacOS Big Sur Not Showing
Some Mac users complain that the latest MacOS Big Sur is not showing in the Software Update section on their device. This happened because your Mac has a lower operating system than MacOS 10.9 i.e. 10.8 or earlier. Such users have to upgrade their Mac device to 10.9 or later version first and then they will be able to upgrade it to MacOS Big Sur.
#1. MacOS Big Sur Not Downloading
Many Mac users tried to download the MacOS Big Sur but they faced some errors. The MacOS Big Sur installation is not possible before the completion of download. So, let us take a look on “MacOS Big Sur Won’t Download” issue and understand how to fix it.
- Make sure your Mac device has enough storage space, it must have at least 35.5GB free storage space to download and install MacOS Big Sur from Apple.
- Make sure your internet connection is stable. If your Mac device has lost connection too frequently then it’s impossible to download MacOS Big Sur.
- Make sure your Mac device is connected to a high speed WiFi/Broadband because the MacOS Big Sur is a 12.18GB file. The downloading will take time as the file size is too large, you must have enough battery and unlimited internet to download it.
- If you are facing “gateway timed out” or “bad gateway” error then you should restart your Mac in “Safe Mode” and try to download & install MacOS Big Sur again. To restart your Mac in safe mode, open Apple menu, select restart and hold down “Shift” key when it is restarting.
When everything is perfectly working on your side, it is important to check if there is any problem in Apple’s server. You should check the Apple System Status Page to verify that the server is not down. If there is an issue in the server, you should wait until it is fixed by Apple and then try to download MacOS Big Sur on your Mac device.
#2. Wrong MacOS Version Downloading Issue
When the MacOS Big Sur operating system released, many users complained that they got a wrong MacOS version. This error happened to the Mac users who tried to download Big Sur Beta Profile on their Mac device.
After downloading and installing, the users got updated to 10.15.6 beta version of Catalina and Not MacOS Big Sur. If you have also faced this error on your Mac, here we have a quick solution for you. Kindly follow the simple steps mentioned below:
- Open terminal
- Enter root password
- Unenroll from the Beta Program
- Enroll in the DeveloperSeed Beta
/System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/seedutil enroll DeveloperSeed
- Close and re-open System Preferences, then go to Software Update.
- The new MacOS Big Sur Beta should now show up.
In this way, you can fix the issue of wrong MacOS downloading on your Mac.
#3. MacOS Big Sur Not Installing
The MacOS Big Sur installation starts right after the completion of downloading. But some Mac users complained that the installation process did not start or showed some error. Some users also faced the Mac device got stuck in initial stage of installation.
In case you are facing MacOS Big Sur not installing issue on your Mac then you need to fix it. We are going to share two important techniques that can fix this issue in no time.
Reset NVRAM/PRAM on Mac:
When you reset NVRAM or PRAM on your Mac, it can fix many issues including MacOS Big Sur not installing problem. Kindly follow the steps given below:
- Shutdown your Mac device and wait till it completely turns off.
- Press Power button and hold down Command+Option+P+R for 20 seconds.
- After 20 seconds, release all four keys as you hear the Mac startup sound or chime.
- The NVRAM/PRAM has been reset on your Mac.
- After resetting NVRAM, you need to set the timezone, startup disk, screen resolution, default language and speaker volume on your Mac.
Reset SMC on Mac:
The System Management Controller (SMC) plays an important role in functioning of Mac devices. Therefore you should reset the SMC to fix MacOS Big Sur not installing issue. The SMC resetting process is different for different Mac devices. Don’t worry, we will explain each method separately.
For Mac users who have MacBook with Touch ID, the Touch ID is the Power button in SMC resetting process.
How to Reset SMC on MacBook with Non-Removable Battery
- Shutdown your MacBook.
- Press & Hold Shift+Control+Option keys and Power button for 10 seconds.
- After 10 seconds, release all four keys.
- Now, Press the Power button to turn on the MacBook.
How to Reset SMC on MacBook with Removable Battery
- Shutdown your MacBook.
- Remote battery from its back.
- Press and Hold the Power button for 5 seconds.
- Release the Power button and put the battery back into MacBook.
- Press the Power button to turn on the MacBook.
How to Reset SMC on Mac PC/Computer
- Shutdown your Mac PC and wait till it completely turns off.
- Unplug the power cord and don’t do anything for 15 seconds.
- Plug in the power cord again and don’t do anything for 5 seconds.
- Turn on the Mac PC again.
In this way, you can reset the SMC on your Mac device. After resetting the SMC, you should try to install MacOS Big Sur on your Mac.
#4. MacOS Big Sur Stuck in Endless Boot Loop Mode
When you install MacOS Big Sur or any system update, the Mac device restarts several times. But some Mac users claim that their Mac device got stuck in endless boot loop mode during MacOS Big Sur installation process.
When your Mac is stuck in endless boot loop, the device keeps restarting but the installation is not progressing at all. This error is quite irritating and you need to fix it as quick as possible.
We recommend you to force shutdown your Mac and restart it in safe mode. To turn on Mac in safe mode, you should press & hold the Shift key and press the power button.
If your Mac starts properly in safe mode then the endless boot loop issue is caused by a third party app that has installed a Kernel extension or a LaunchDaemon. So, you need to find that app/extension and remove it to fix the issue.
In case your Mac does not start properly in safe mode then you should try our other techniques to fix MacOS Big Sur endless boot loop issue.
Select the Startup Disk (Right Disk):
During the MacOS Big Sur installation, the Apple may split the operating system and user data into two volumes. This may cause the Mac device to get stuck in endless boot loop mode. But you can fix it in just two minutes by following the simple steps given below:
- Restart the Mac and press & hold the Option key.
- Wait till the “select startup disk” option appears on screen.
- Leave the Option key and choose the right startup disk.
- You should select Macintosh HD or MacOS as your startup disk.
- Your Mac device should start up normally.
Unlock the Startup Disk Using MacOS Recovery Mode:
During MacOS Big Sur installation, your Mac device may get stuck in boot loop mode. This can happen because the startup disk is encrypted. In such circumstances, you have to unlock the startup disk to resolve the MacOS Big Sur stuck in endless boot loop issue.
- Restart your Mac and keep holding Command+R keys.
- Soon you should enter the recovery mode on your Mac.
- Select the startup disk and enter the password to unlock it.
- Restart the Mac to turn it on in normal mode.
We hope that the MacOS Big Sur stuck in boot loop mode issue is solved by above methods.
#5. MacOS Big Sur Installation Stuck in the Middle
This error happens after MacOS Big Sur installation process is started. It means you have successfully downloaded MacOS Big Sur file and the installation is going on. Suddenly, you come to know that the Apple logo with black screen is appearing on your Mac and the progress bar is stuck i.e. not moving ahead.
Many Mac users have claimed that their Mac device stuck on Apple logo in the middle of MacOS Big Sur installation. If you are also facing this issue then we have a quick solution for you, just go through the instructions given below.
- This may happen because the MacOS Big Sur installation file is too large (12.18GB). So we suggest you to wait for a few hours to see if the progress bar moves ahead.
After a few hours, if you still see the Apple logo in black screen with progress bar stuck at the same place/percentage as of earlier then you need to take some action.
- You should hold the power button to force shutdown your Mac. Perhaps, you don’t like to do it but you don’t have any other choice. So, just do it. After 10 minutes of shutdown, press the power button to turn it on.
Now, your Mac should start up properly with MacOS Big Sur. In case you still face the Apple logo stuck and not-moving progress bar then you need to apply the following trick.
- Simply hold the power button to turn off your Mac. After 10 minutes, press & hold Shift key and press the power button to turn on your Mac in safe mode. The Mac should start up in safe mode, then you should restart it to turn it on in normal mode.
We hope your MacOS Big Sur installation stuck in the middle issue is resolved.
#6. MacOS Big Sur Installation Failed and Bricking Issue
Apple Inc. rolled out MacOS Big Sur operating system for everyone who has Mac, MacBook Air, MacBook Pro and iMac of 2013 and later. But some users with MacBook Pro 2013 and 2014 13-inch device have faced a dangerous issue.
After starting MacOS Big Sur installation on MacBook Pro 2013-2014, the users complain that their MacBook show a black screen with nothing showing on it. Some Mac users tried to Reset PRAM/NVRAM and SMC but nothing worked and the same black screen was appearing on their Mac device. It means the MacBook is bricked i.e. dead or not working at all.
When the issue became too serious, the Apple Inc. blocked MacOS Big Sur installation on all MacBook Pro 2013 & 2014 13-inch devices. So, if you have that model of MacBook Pro and not installed MacOS Big Sur earlier then you won’t be able to do it now. It is possible that Apple developers will allow Big Sur after fixing this issue, but it is just a hope.
In case you have tried to install MacOS Big Sur on your MacBook Pro 2013/2014 13-inch device and it was successfully installed then you are really lucky. If your MacBook Pro is stuck on black screen as we discussed above then you have to visit the Apple service center to get it repair.
Important Note: The software update (upgrade) for MacOS is provided by Apple Inc.. When your MacBook Pro is bricked during software update (i.e. MacOS Big Sur installation), it is not your fault. So, you need NOT to pay for the repair. Make sure you get your MacBook Pro repaired at free of cost or very low service fee to be charged by the Apple service center.
#7. MacOS Big Sur Installation Failed on Silicon Mac M1
The Apple Inc. launched several Mac devices with M1 chip in 2020. These new Macs don’t have an Intel chip. The Silicon Mac users complain that they are not able to install MacOS Big Sur on their device.
When the users tried to perform software update on their Silicon Mac with M1 chip, they faced an error as “An error occurred preparing the update. Failed to personalize the software update. Please try again.”
Reinstall MacOS Big Sur:
The above error occurs when you have erased your Silicon Mac that contains Apple M1 chip. You need to reinstall MacOS Big Sur on your Mac using any of the following methods.
Use Apple Configurator App
In order to use this method, you must have another Mac device with MacOS Catalina 10.15.6 or later. In addition, that Mac device should have the latest version of Apple Configure App which is available for free at the App Store.
You will also need a Type-C to Type-C or Type-A to Type-C USB cable. Make sure the cable transmits both the power and data. You should connect both the Mac computers using USB cable and follow the instructions given at How to Restore the Firmware Using Apple Configurator.
Go to Apple Service Center
The Apple Service Center is available at most places across entire United States. When MacOS Big Sur installation failed issue occurs, you can try our different techniques. If non of the works for you then it is better to visit the Apple Service Center and ask them to upgrade your Mac to the latest MacOS Big Sur operating system.
If you don’t have a WiFi or Broadband connection to download such a large size file (i.e. 12.18GB) for MacOS Big Sur then you should simply go to Apple Service Center. The authorized service executives will install MacOS Big Sur on your Mac device with proper step by step method to keep it safe.
The MacOS Big Sur (Version 11) has brought many new things to Mac users across the world. But the MacOS Big Sur installation failed issue has affected many Mac users. We hope that our simple techniques have helped to fix the issue on your Mac and now it’s working fine. If your Mac still has any issue, you can go to nearby Apple Service Center or contact Apple Support Team for help.
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