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Fix Big Sur Update Issues(Can't Install on Macintosh Hard disk drive)

Summary: This folio solves fifteen+ macOS eleven Big Sur update problems, troubleshooting downloading failures, installation errors similar "macOS Big Sur cannot be installed on Macintosh Hard disk drive," startup issues, and functioning bugs.

macOS eleven Big Sur (not the expected macOS 10.16) is a terrific update from Catalina, with multiple new features and an overhauled wait. Though not every bit buggy as macOS Catalina, it doesn't necessarily hateful Big Sur is flawless.

macOS Big Sur problems are however of great business organisation for many users. You tin can downgrade macOS Big Sur to macOS Catalina or face the issues and solve them.

As far as we are concerned, except some Macs proceed crashing and Touch on ID not working on Mac after the update, at that place are xv+ problems with Big Sur.

• Installation Problems:
• macOS Recovery manner not working
• Information issues
• Fail to download macOS Big Sur
• macOS Large Sur cannot be installed on Macintosh Hard disk drive
• Older Macs incompatible and bricked
• macOS Big Sur won't boot up
• macOS Big Sur stuck in a boot loop
• Mac stuck in Recovery style

• Performance issues:
• Bluetooth is not working
• Network is non working
• Mac slow & hot later macOS 11 update
•  Shorter battery life issues
• Mouse problems
• Apps quit unexpectedly in macOS Big Sur
• Can't apply Airdrop in macOS Big Sur
• External hard drive read-only on Mac

In the post-obit sections, nosotros will talk near applied solutions to set up macOS Big Sur problems. Allow'south get started.

Guide to macOS Large Sur problems:

• 1. Information issues in macOS 11 software update
• 2. Fail to download and install macOS Large Sur
• 3. Startup bug later installing macOS Large Sur
• 4. Poor Performance When Using macOS Big Sur
• 5. Congenital-in or Third-party Apps Issues in macOS Large Sur

Data issues in macOS 11 software update

Since macOS ten.15 Catalina, Apple tree divide the startup deejay into ii split volumes, Macintosh Hd and Macintosh HD - Data. Information technology makes information fill-in with third-party apps difficult, specially those that offer bootable backups.

Therefore, it'southward e'er recommended to back upwards Mac files earlier every major macOS software update using the congenital-in Time Machine.

Suppose you lot upgraded to macOS Big Sur on a Mac that uses a Fourth dimension Capsule or other network storage device as the backup destination. In that example, your existing backups are also upgraded to be used on macOS Large Sur. Note that these backups and new backups created after are just compatible with Mac computers running Big Sur and afterwards.

If yous are using 3rd-party software to dorsum upward your Mac, cheque if it's gear up for macOS 11.

How to restore or recover lost files after macOS Big Sur update?

Though Apple has made a precaution that important files may get lost if the macOS software update is interrupted, many of you still forgot to back up your MacBook Air/MacBook Pro/iMac/Mac mini. Here is what you should do if you've encountered data loss later the macOS software update:

How to gear up:

If you lot have backed upward your Mac to an external hard drive with Time Machine, you can only restore from the Fourth dimension Machine backups.

• How to restore Mac files from Time Machine backup?

If you lot don't take whatever backup while the failed macOS Big Sur stops your Mac from booting upward, you lot can try iBoysoft Data Recovery for Mac to get files off Mac that won't turn on.

• How to recover data from the Mac that won't plow on?

How to Find Missing Trash & Junk Folder in macOS Large Sur Postal service?

Prepare problems in Mac Mail afterwards macOS Big Sur update, including Trash and Junk folder missing from the Mail service sidebar and other so-chosen Mail "bugs." Read more >>

Fail to download and install macOS Big Sur

While downloading and installing macOS eleven, users accept experienced failures along with diverse error messages, such as:

• The network connexion was lost.
• In that location is not enough costless space.
• Installation failed.
• You may not install to this volume because it is currently existence encrypted.
• You may not install to this volume because the figurer is missing a firmware partition.
• Yous may not install to this volume considering it has a disk password.
• Installation of macOS could not proceed. Installation requires downloading of import content. That content tin can't be downloaded at this time. Try once more later.

Tin can't download macOS Big Sur or the process takes also long, what to do?

With a large size of over 12 GB, it might have a while to download macOS Big Sur. However, if the macOS download takes more time than expected (similar hours), there's probable insufficient storage space or an unstable internet connexion. You lot tin can read below for the solutions to the "macOS Big Sur download has failed" error.

Prepare macOS Big Sur not downloading:

• Ensure that your cyberspace connexion is robust and stable. If you use Wi-Fi to download macOS Large Sur, consider switching to an Ethernet cable.
• Visit Mac'southward System Condition page and bank check whether the "macOS Software Update," "Apple ID," and "Mac App Store" sections have a green dot side by side to them.
• Try to find the partially downloaded macOS Big Sur files and a file called "Install macOS 11" on your Mac hard drive. After deleting them, restart your Mac and re-download macOS Large Sur.
• Switch to the Mac App Store for downloading macOS Big Sur if downloading from About This Mac > System Preferences > Software Update doesn't work correctly. To exercise it, open the Mac App Store and search for macOS Large Sur.
• Free up disk space on Macintosh Hard disk drive to make sure you take fabricated enough gratuitous space for the software on the target disk. macOS Big Sur requires 35.5 GB free disk space to upgrade from macOS Sierra or later and upward to 44.5 GB available deejay space from macOS El Capitan or earlier.

Why macOS Big Sur Updates Are So Huge & How to Mitigate

macOS Large Sur updates are getting larger, especially on M1 Macs. Meet what causes the large installer file and how to cut back on the size. Read more >>

macOS Big Sur cannot exist installed on Macintosh Hard disk drive?

Sometimes, a smooth downloading doesn't guarantee a perfect installation, as you lot may get stuck on "Setting Upwards Your Mac." In which case, you will likely receive an error notification maxim, "macOS Large Sur cannot be installed on Macintosh HD." There are a few reasons for that:

Why can't Large Sur exist installed on Macintosh Hard disk?

• Your Mac is incompatible with Big Sur.
• At that place's not enough disk space on Macintosh HD.
• A disharmonize in the system is preventing the macOS installation.
• Yous are installing Big Sur to the aforementioned APFS container as previous versions of macOS Catalina x.15.

You lot may also see a like bulletin reading "macOS Big Sur Cannot Be Installed On This Computer" when you lot attempt to install Big Sur on an unsupported Mac. (e.m. iMac 2020, Retina 5K, 27-inch).

To ensure a successful macOS installation, you demand to bank check whether your Mac is supported before downloading macOS Big Sur.Here is the list of Mac models supporting macOS Big Sur:

• MacBook Pro (Late 2013 and afterwards)
• MacBook Air (Mid 2013 and afterward)
• MacBook (Early on 2015 and later)
• iMac Pro (2017 and later)
• iMac (Mid 2014 and afterward)
• Mac mini (Late 2014 and after)
• Mac Pro (Late 2013 and later)

Suppose you tin can't install the downloaded macOS Large Sur update even with a compatible Mac model, delete inessential files to make more free space for it (Cheque how much deejay space you have in Storage Management), then follow the solutions below.

Fix macOS Big Sur not installing:

• If there'southward no prompt for the installation to continue afterward the macOS Big Sur download completes, search in your Application folder for a file named "Install macOS 11", so double-click it to start the installation process.
• If macOS Large Sur cannot be installed on Macintosh Hd, you can endeavour installing information technology in Safe Mode. Follow these steps to kicking into Prophylactic Mode: shut down Mac > look for 10s and and then press the power button > hold down the Shift key once Mac starts up > Release the key when the Apple logo appears.
• If you can't upgrade from macOS 10.15 Catalina to Big Sur, attempt to update to 10.15.6 starting time.
• If your Mac is T2-secured, to install Big Sur, you demand to kicking your Mac to Mac Recovery mode > Utilities > Startup Security Utility, and then make sure the Secure Boot option is Non ready to "No Security."
• If y'all receive the error "you may not install to this volume because it is currently beingness encrypted" when selecting a disk for Big Sur installation, wait for the disk encryption to finish and then disable FileVault in Safe Mode (Apple logo/menu > System Preferences > Security & Privacy > FileVault) before reinstalling.
• If you fail to install the Big Sur upgrade and receive "an mistake occurred applying the software update" or "you may not install to this volume because the computer is missing a firmware partition," try to restart with "Control +R" or "Command +Option +R," and then reinstall the macOS in macOS Recovery.
• If y'all fail to install the macOS software considering the Mac goes to sleep while preparing macOS 11 Big Sur, you can adjust sleep and wake settings for your Mac by going to the Apple menu > System Preferences > Battery and so trying it again.

Note: Be reminded that Apple tree replaced the "Energy Saver" system preference with a new ane named Bombardment in Big Sur. Occasionally, yous may receive a bulletin saying that you tin can't open the "energy saver" preferences pane because it is not bachelor to you lot at this fourth dimension.

Startup issues after installing macOS Large Sur

After installing macOS Large Sur, the Mac will automatically restart from the newly installed system. What comes forth with is a repeated kicking loop, restarting, blackness screen, and and then loading macOS xi Big Sur. Simply if any problems occur or any part of those gets stuck, the MacBook won't turn on.

You might see it stuck on the loading screen with an Apple logo or return some symbols that y'all take never seen on your MacBook Air/MacBook Pro, such every bit a flashing globe, a folder with a question mark, the pink screen of death, or a prohibitory icon.

Here are the solutions to use when you're having problem logging into your Mac after installing macOS Big Sur.

Fix macOS Big Sur startup issues:

• Forcefulness your Mac to restart.
• Repair your Macintosh Hard disk by booting into macOS Recovery > open up Disk Utility > choose your Mac difficult drive > click First Aid. Deejay Utility will so run Showtime Aid to scan your disks and repair detected errors.
• Restart your Mac to Safe Way and reinstall macOS.
• Erase your Macintosh Hard disk drive in Disk Utility and create an external bootable installer.

Related articles:

• How to ready Mac stuck on loading screen?

• How to ready Mac black screen later macOS Big Sur update?

• How to fix when Mac shows a flashing folder with a question marking?

• How to set up the prohibitory symbol at Mac startup?

• How to fix if Mac won't allow you log in with right password?

macOS Big Sur upgrade bricked some incompatible Mac models

If y'all manage to perform a Large Sur installation on an incompatible Mac, especially on an old Mac model, chances are, it won't run smoothly. Fifty-fifty worse, information technology may brick your Mac, as many users testified. You tin can save your Mac by downgrading Large Sur to Catalina if that happens.

Mac stuck in a kick loop after macOS update

While Mac repeatedly restarts after the Large Sur installation, yous should go on your Mac plugged in to avoid failures. But if y'all are stuck in a loop where y'all log in and get logged out over again, endeavor these solutions:

Fix 1: Remove the file that makes macOS think it's starting Big Sur for the first time. (It's condom to delete this file because it won't affect other data.)

1. Restart your Mac, then printing and concurCommand +Due south keys as soon every bit the Mac boots upward.
2. Type in the following command in the command prompt and press Enter. /sbin/mount -uw /
3. Blazon in this command and press Enter. rm /var/db/.applesetupdone
4. Restart your Mac.
5. You will at present be prompted to create a new admin user account

Set up 2: Kick Mac into Safe Style to isolate problems caused past third-party software (Kernel Extension or a LaunchDaemon) that launches when Mac boots. If you lot can log in successfully in Safe Mode, remove all log-in items and re-add them to find the culprit. If your Mac Prophylactic Mode is not working, try the adjacent gear up.

Set up 3: Reinstall macOS.

Big Sur Recovery mode not working

Afterward the Big Sur installation, some users may neglect to boot into Mac Recovery with theCommand +R keys, especially with Macs using Apple Silicon M1 chips. The truth is that M1 Mac has a different style to enter Recovery: Turn off Mac > press the power push button until y'all run into the startup options window > cull Options > Continue.

If y'all are using an Intel Mac but the Big Sur Recovery mode is not working issue exists despite doing everything correctly. Information technology could be caused by a faulty keyboard or, less unremarkably, a corrupted/deleted recovery partitioning.

How to fix Big Sur Recovery mode not working?

• Replug the keyboard or try some other ane.
• Kicking into Internet Recovery mode instead by usingControl +Pick +R, orShift +Option +Command +R.
• Create a bootable macOS installer.
• If you are trying to reinstall the macOS, restore from Time Machine backups

Mac stuck in Recovery mode on Apple tree Silicon Macs

Some may find their Apple Silicon MacBook (M1) with built-in macOS Big Sur more decumbent to exist stuck in Recovery mode and proceed spinning when enabling arrangement extensions for apps.

To solve this problem, the only thing yous need to do is update your organisation to the latest available operating organization.

Then you lot'll exist able to reaccess Mac Recovery.

Poor Functioning When Using macOS Big Sur

Fortunately, y'all succeed in downloading, installing, and booting from macOS Large Sur. Only the experience in using this operating system maybe not exist as practiced every bit you expected.

You may experience Mac sound not working, Mac speed slowing down, Mac frozen, or other problems. Read on and check what yous tin can practise when suffering from those problems.

How to fix if macOS Big Sur slows, freezes, heats the Mac?

macOS 11 Big Sur could lag your Mac and brand computers really hot, especially yous are using MacBook Air and MacBook Pro that are relatively former. Earlier you downgrade from macOS Large Sur to Catalina, attempt the following things.

Gear up macOS Big Sur freezing/heating/slowing downwardly Mac:

• Disable unnecessary login items by Apple menu > Arrangement Preferences > Users & Groups > Login Items.
• Quit processes or applications in Activity Monitor (the Mac Chore Manager) if your Mac freezes on the beachball.
• Quit or disable the Spotlight Search feature when a lack of organization resources heats upwards your Mac.

Bluetooth is not working in macOS Big Sur

Bluetooth makes it easier to transfer files between Mac and other devices. If your Mac'southward Bluetooth is not working later on macOS eleven update, endeavour these fixes:

Set one: PrintingShift +Pick and click the Bluetooth icon in the menu bar > Reset the Bluetooth module > OK > restart the Mac.

Set 2: Navigate to Finder > Go > Go to Binder > enter /Library/Preferences > press Enter > locate a file called com.apple.Bluetooth.plist > delete it or move it to antoher folder > restart your Mac and re-conenct bluetooth devices.

Network (WiFi) is not working in macOS Big Sur

If you detect your Mac connected to Wi-Fi but no internet or having other problems with cyberspace connectedness via Wi-Fi or Ethernet later upgrading to macOS Large Sur, here is how to fix the internet connection problems:

Prepare i: Go to Arrangement Preferences > Network > Wi-Fi > Advanced > Remove the connected WiFi connections > restart Mac and reconnect to the Network.

Fix 2: Start Mac in Safe Mode and run across if you tin can connect to the internet.

How to fix abnormal battery bleed in macOS Big Sur?

You may feel your Mac'due south battery lasting much shorter right later the Big Sur install. This is likely due to macOS Big Sur doing some background piece of work to ready itself up, and the battery life should go dorsum to normal subsequently things are settled down(it unremarkably takes a few hours or a day).

Over again, this abnormal bombardment drain on notebooks similar MacBook Air and MacBook Pro could issue from underperforming batteries.

Prepare macOS Big Sur abnormal battery drain:

• Locate the programs that impact the energy nearly in Action Monitor > Energy and close them to come across if the battery improves.
• Open the Mac App Store to check whether the apps taking upwards your battery life are updated. If not, update them to the latest version.
• Reset SMC after login to ameliorate manage power, battery, fans, and other related features.
• Reset NVRAM: Plow on Mac > hold down Pick + Command + P + R for nearly twenty seconds > wait until your Mac restarts.
• Check your MacBook'due south battery health and accuse circumvolve count by Apple bill of fare > About this Mac > Organization Report > Hardware > Power.
• Your battery may need to exist repaired or replaced if it'due south running out of cycle counts.

            • MacBook Pro non charging, what to practise?

Mouse problems in macOS Big Sur install

If you lot've installed macOS Big Sur and found your Apple Mouse not working, open up the ~/Library/Preferences/ directory in finder and select and delete the following plist files and restart your Mac to get the mouse working:

• com.apple.AppleMultitouchMouse.plist
• com.apple.driver.AppleBluetoothMultitouch.mouse.plist

If your mouse cursor disappears on Mac, read this comprehensive guide to prepare it: Mouse Cursor Disappears on Mac: Why & How to Fix (2022)

Built-in or Third-party Apps Issues in macOS Big Sur

Software is one of the most critical parts of any computer, including built-in programs and third-political party apps. In the new macOS Big Sur, software incompatibility could cause apps unexpectedly quit, kernel panic, or even the whole organisation to crash.

Apple Card bar disappeared in macOS eleven Big Sur, how to gear up?

Foreign but true, some users report that the Mac card bar is missing icons such as the Clock, WiFi, Control Center, etc. This is reasonable as whatever new operating system could be glitchy. In this case, y'all can merely restart your Mac or follow these steps:

1. Open up Arrangement Preferences > Users & Groups.
2. Click on Login Options and type your admin password.
3. Disable the option "Testify fast user switching menu as."
4. Once the menu bar is back, go to Organization Preferences again and select Dock & Carte Bar (the new preference pane that lets you show/hide controls).
5. Disable Fast User Switching to remove it from Control Center.

External hard drive is read-merely in macOS Big Sur

External hard bulldoze read-only in macOS Big Sur is usually caused past file permission set to be read-only or file system incompatibility, mostly with NTFS-formatted drives. If you can't write to your disks, check these:

• Modify device share permission by right-clicking > Get Info > Sharing & Permissions.
• Find an NTFS for macOS Big Sur software.
• Format the drive in Deejay Utility with a Mac-uniform file organization like APFS.

If these quick fixes don't allow you to write to the external disk, read our article below to fix it:

• How to solve external hard drive read-only on Mac?

Tin't use Airdrop in macOS Big Sur, how to fix?

You might be unable to use AirDrop on a Mac running macOS 11 for file transferring and sharing. This could event from the System Integrity Protection (SIP) bug on macOS Big Sur beta. You tin can disable SIP to fix information technology.

• How to set up AirDrop non working?

There are many other macOS Large Sur problems like software unexpectedly quit, and apps like VirtualBox, AdGuard, Chrome, and Steam for Mac won't respond in macOS Big Sur. If you are unsuccessful with other working solutions, downgrading Big Sur to an older operating system like macOS Catalina and Mojave could do the trick.

Or you tin factory reset the Mac to return to the defaults for a completely clean macOS Reinstallation to get rid of the problems.

Verdict

We've covered the common issues you may encounter earlier, while, and afterwards the Large Sur installation. Here is the summary of macOS Large Sur problems:

• Data loss and macOS xi update failure
• Startup issues after installing macOS Big Sur
• Poor performance when using macOS Large Sur
• Spotlight non working
• Congenital-in or 3rd-party apps problems
• Kernel_task loftier CPU usage
• Mac Touch Bar non working

Just make sure yous accept enough disk space for the update and a backup of essential files to avoid data loss if any issues happen.

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