Big Sur is a terrific update to macOS. But, like any new operating system, it’s not without its problems. For example, Catalina caused many problems, some of them serious, for many users. Thankfully, for most of us, the problems we’re likely to run into are much less serious and usually have a straightforward fix. In this article, we’ll examine some of the most common macOS Big Sur issues and fixes.
So, I finally got around to investigating the problem – I had’t seen any good blog posts on it (most of them were things like take it to a Mac Genius). Finally, I found a hint buried in an Apple forum: the problem stems from Spotlight. The indexes for Spotlight get corrupted, and that causes the reboot.
12 macOS Big Sur issues
In this blog post, we’re covering the issues that may occur during Big Sur installation and after you've upgraded your Mac. If you’re interested in resolving a particular issue, just go through this list and choose the one that relates to you:
1. macOS Big Sur won’t download
If you see a message while you’re downloading Big Sur that says, 'macOS Big Sur download has failed,' there could be a number of reasons. Here’s what to do when macOS Big Sur won’t download.
Have you got enough free space?
It can be difficult to decide what files to remove and what to keep. However, there are many files on your Mac that take up several gigabytes of space that you probably don’t even realize are there. These include temporary files, cache, language support files, and many others. CleanMyMac X can identify those files and allow you to remove them with a couple of clicks, potentially clawing back gigabytes of space.
CleanMyMac X has a free version you can try, and this app is notarized by Apple.
More ideas when macOS Big Sur won’t download
2. macOS Big Sur won’t install
If the download completes successfully, but macOS Big Sur won’t install, there are a few things you should try.
Also, double-check that your Mac is compatible. The list of Macs on which Big Sur is supported is below:
If you see the 'Installation failed: an error occurred while installing the selected updates' message, the first thing you should do is restart your Mac. If this doesn't help, the problem is probably on Apple's side. Wait for some time, and try installing the macOS Big Sur again.
3. macOS Big Sur freezing
Your Mac freezes after the upgrade? Your apps and programs can actually be the reason why macOS Big Sur is freezing.
To quit the unresponsive app, press Command-Option-Esc. This will initiate a Force Quit menu. Click the app that makes your macOS freeze (it will usually have not responding status) and press Force Quit.
If the problem persists, running CleanMyMac X can help fix performance issues, including freezing. Here’s how you can quickly get your Mac back to normal:
CleanMyMac X is not a magic pill for all Mac problems, but it does fix things sometimes. It’s especially useful when you have a lot of conflicting software and want to clear up things a bit.
4. macOS Big Sur setup fails
This error occurs after your Mac has updated to Big Sur, but during the setup process. Here’s what to do when macOS Big Sur setup fails:
5. macOS Big Sur won’t boot
If you’ve successfully installed macOS Big Sur, congratulations! You’ve cleared the biggest hurdle. However, you may still run into problems, one of which might be that Big Sur fails to boot. Here’s a checklist to follow if macOS Big Sur won’t boot.
6. macOS Big Sur is running slow
This is perhaps the most common problem you’re likely to run into with Big Sur. It’s logical to assume that a new version of macOS should run faster than previous versions. And in some cases, that’s true. For example, Safari tends to speed up with every release. But new versions of the OS also put more pressure on system resources.
So, if you have a Mac that’s a few years old, you are likely to encounter that the macOS Big Sur is running slow. There is plenty you can do to mitigate that, though.
There Are Always Problems Mac Os Catalina
Things that can slow down your Big Sur experience:
If you have a free minute to investigate, you can once again use CleanMyMac X to disable login items that can considerably slow down your Mac at start-up and while it's running.
Now, all those apps won't be opening as you start up your Mac.
Check your Activity Monitor
Activity Monitor will tell you which processes are consuming more than their fair share of CPU cycles and RAM. Once you’ve identified those, you can decide if you really need those apps. If not, you can get rid of them, and that should speed up your Mac. Likewise, there may be login items you have long forgotten about that are running in the background, slowing down your Mac.
If your Mac speeds up, you know it was that process that was causing the problem. If it’s associated with an app or login item, you can decide whether to uninstall it.
7. Apps are not launching on Big Sur
On the first day of the official Big Sur release, many users experienced problems with applications after they upgraded their Macs. Some reported apps not launching on Big Sur, while others complained about both programs and computers running slower than usual.
As it occurred, there was a problem with Apple's Online Certificate Status Protocol that failed to validate digital certificates for software on Macs. It disabled Apple's Gatekeeper, which in turn couldn't validate apps. If you experience a similar problem again, first check whether everything's okay with the Apple Servers. Visit the official Apple Support system status page for the latest updates. 8. Bluetooth is not working on macOS Big Sur
Bluetooth is an essential feature on your Mac: it allows you to connect all your wireless devices and use your Mac more effectively. If you find out that Bluetooth is not working on your Mac after the upgrade to Big Sur, here’s a quick fix that could help:
After the process is finished, restart your Mac as usual. The issue should be gone.
9. Wi-Fi problems on macOS Big Sur
Some of the users complained that Wi-Fi stopped working on their Mac after the upgrade. Here’s what you can do to fix Wi-Fi connection problems in macOS Big Sur.
The first thing you should do is forget the network.
Next, you’ll need to reset SMC. This often helps to solve bugs related to power, battery, fans, and other features.
To check whether your Mac has a T2 chip, go to the Apple menu > About This Mac. Click System Report and select Controller. If your Mac has the Apple T2 Security Chip, there will be an 'Apple T2 chip' on the right.
There Are Always Problems Mac Os Sierra
To reset SMC on Macs with the T2 chip
To reset SMC on desktop computers with the T2 chip
There Are Always Problems Mac Os X
After you reset the SMC, reconnect to the Wi-Fi network. Things should be back to normal.
10. Battery drain on macOS Big Sur
Several users complained that their Macs were showing battery service required warning after installing macOS Big Sur. It can be frustrating, especially if your Mac is brand new and has only a few battery cycles. If you’ve noticed that macOS Big Sur causes battery drain, resetting PRAM may help.
PRAM (parameter random access memory) contains control settings and configuration of your Mac. Resetting PRAM can fix what’s wrong with desktop, keyboard, volume, or battery settings.
After your Mac starts up, your settings should go back to default, and the battery issue should disappear. If this didn’t fix your battery issue, you might need to revert to Catalina.
Sometimes certain apps may eat too much of the CPU and battery resources. You can identify such programs by using the Activity Monitor. It's best to delete such applications and see if it resolves the battery issue. CleanMyMac X can help you with that — it deletes multiple apps and removes all traces of the application.
11. USB devices disconnecting randomly on Big Sur
This issue has been bothering 2020 MacBook Air and MacBook Pro users on macOS Catalina. The 10.15.6 update finally fixed the bug, but the macOS Big Sur seems to randomly disconnect USB connections too.
Disconnecting and reconnecting a USB hub may help. Some users resolved the issue by restarting their Macs. But this doesn’t fix the problem reliably. Hopefully, the developers will address this issue and present a solution with the next software update.
There are many ways in which Big Sur can run into problems. Thankfully, there are also lots of solutions. If you work through them step by step, you should be able to fix the problem. And using automated fixers, like CleanMyMac X, can help make the whole process much quicker and funnier.
12. Grey screen with mouse pointer on Big Sur
This is a newly found installation issue that many Mac users report. Trying to run the Big Sur installer the screen goes grey displaying a movable mouse pointer. There’s no way to proceed next.
The possible solution involves resetting NVRAM.
Note: If your Mac has a firmware password enabled, the above combination won’t make the reset and your Mac will likely boot to macOS Recovery. To reset NRAM in this case, you will have to disable firmware password first.
To disable firmware password, run macOS Recovery > Utilities > Startup Security Utility.
It’s safe to say that nearly every Mac user wants to update to the newer macOS versions. However, what they do not know is that even a stable macOS like High Sierra or Mojave has its disadvantages. That means if you are thinking about an upgrade, you have to prepare to troubleshoot some issues at some point.
One of the most common issues with High Sierra is the sleep-wake failure, which causes a MacBook not to wake up from sleep or just randomly restart itself. After some Mac users updated to High Sierra or Mojave, they reported having this problem, where they find it difficult to wake their devices from sleep. Regardless of the model or type of Apple computer they’re using, they just cannot wake up their devices from sleep.
But how does this sleep function activate?
Putting Your Mac in Sleep ModeThere Are Always Problems Mac Os Operating System
The sleep mode is only an optional feature, but it is quite handy for Mac users who need to regularly take a break from using their devices yet forget to switch them off. It’s also a useful feature that can help you achieve your energy-saving goals.
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To activate this feature, do the following:
Waking Up Your Mac from a Long Sleep
So, you have just upgraded to High Sierra or Mojave and your computer has entered sleep mode. Now, you are faced with a sleep-wake failure issue. What should you do?
Don’t panic! There is a way to fix MacBook sleep-wake failures. Below, we’ve listed the most obvious and effective solutions to resolve your problem, and you can try all of them as needed.
1. Check Your Power and Screen Brightness.
Before you do anything, you need to check the most obvious possibilities. Is your screen brightness set to a minimum? Is your Mac powered on? If you are using an external display, is it actually switched on? Is your Mac plugged into a power source? If you are using a MacBook, is the battery drained?
Oftentimes, your Mac may not be in sleep mode. It is possible that its screen brightness might just be adjusted down lower. It is also likely that your MacBook is just turned off. Simply adjusting the brightness or switching on your Mac can resolve your sleep-wake failure nightmares.
2. Switch Off Your Mac and Turn It Back On.
This step involves forcibly turning off and then turning on your Mac. Doing this will allow you to access your computer again and possibly fix your sleep-wake failure problem. To force-restart your Mac, follow these instructions:
3. Perform an SMC and NVRAM Reset.
Performing an SMC and NVRAM reset is a common troubleshooting technique used to fix display and power issues. If your Mac repeatedly gets stuck on a blank screen every time you wake it up from sleep, you should try resetting the SMC and NVRAM.
Here’s how to perform an SMC and NVRAM reset:
4. Reinstall MacOS.
If you’ve already adjusted your display’s brightness, checked your connection, and performed an NVRAM and SMC reset yet your Mac continuously wakes up to a black screen, you might need to reinstall your macOS.
Don’t worry, because you can always reinstall your macOS without having to format your computer completely. The general rule of thumb, however, is to have a backup first before resetting your OS. You’ll realize the importance of a backup once you experience data loss.
5. Disable System Hibernation.
Aside from the sleep mode, your Mac also has a hibernation mode, which is also optional. The hibernation mode is a helpful, preventive feature that allows you to keep data in the event when there is no power. However, even without this mode, you can still proceed with your daily tasks.
If you don’t need to hibernate your Mac and you frequently have problems with waking up your computer from sleep, try disabling the hibernate mode. To do this, run these commands in your OS X Terminal:
These commands will disable the settings of the hardware that are responsible for activating the hibernate mode. If you ever decide to activate this setting again, simply run the commands in your OS X Terminal, but this time, change the value 0 to 1.
6. Reset Your Mac’s FileVault.
It is possible that a glitch is stopping your system from retrieving all necessary contents and files on your hard drive, which are required to wake up your Mac from sleep. As a result, conflict arises between your full-disk encryption protocols like FileVault and your system crashes when it wakes up.
To resolve this issue, try disabling your full-disk encryption protocols. Next, decrypt your hard drive using third-party tools. After that, re-enable your full-disk encryption protocols. See if this solves your problem.
7. Get Rid of System Junk.
System junk, including cache files, broken downloads, diagnostic reports, and unwanted file logs may have built up in your system over time. If not removed, they can take up valuable space in your drive and worse, interfere with your system activities.
To get rid of system junk, you need to download and install a third-party tool like Outbyte MacRepair. Use it to run a quick scan on your system, empty your trash bin, and delete any unwanted files from all common locations.
What’s Next?
Are you still having problems with waking up your Mac from sleep? The best thing you should do is to contact Apple’s support team or bring your Mac to the nearest Apple Store for service.
Though it rarely happens, it is possible that a hardware problem is keeping your Mac from waking up from sleep. Just make sure you contact authorized support or a legit repair center for the best results.
Let us know what solutions helped you solve your Mac sleep-wake failure problems. Comment them below!
If you’re running into errors and your system is suspiciously slow, your computer needs some maintenance work. Download Outbyte PC Repair for Windows, Outbyte Antivirus for Windows, or Outbyte MacRepair for macOS to resolve common computer performance issues.Fix computer troubles by downloading the compatible tool for your device.
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