But conversely, if you use Catalina, you’re likely to lose older plug-ins and apps you need. So Mojave sits at the intersection that maximizes compatibility and minimizes trouble. And it retains 32-bit support, while still allowing you to upgrade everything you can to 64-bit. If you have a brand-new Mac, Catalina is required. Mac Can’t Update to Catalina. Some users, especially for late 2015 iMac users,complained that they are unable to update to Catalina because their Mac does not notice the new update. Or, they get the following message. 'Update not found. The requested version of macOS is not available'. So How to get Catalina and update to it.

Be it your comfort zone or tech limitations, there are many users who are still working on the macOS Catalina. Since every update brings new updates like bug fixes, system customizations, & personalizations, the macOS version 11 (macOS Big Sur) is worth exploring. From various color combinations to simplest user interface, everything is exciting with the macOS Big Sur.

Just like the iOS14 update that has brought many transforming updates including App Clips, PIP mode, & screen widgets. Same way, while accessing the macOS Big Sur, you will know how many useful features you are missing while unable to use the same. So in case you are still working on the macOS Catalina, check out the ways to upgrade to Big Sur as well as update macOS Catalina.

Is Your Mac Compatible With macOS Big Sur Update?

Since the macOS Big Sur update has been released for quite some time now, users are going gaga over it. However, please know that upgrading to Big Sur isn’t available for everyone of those users. The compatibility issue of the macOS Big Sur update will fully depend on your computer.

So if you do not have those mac computer versions, the only option you have is to buy a new Mac. You can check out the list of the macOS Big Sur update compatible mac versions to know if yours is listed here or not.

Things to Consider Before Updating macos catalina to macOS Big Sur

Sometimes it’s better not to upgrade to the latest version for mac right away as there are a few things that need to be taken care of. Since every one of us wants to have a seamless & smooth transition of the macOS Big Sur update, let’s start considering few of the things as mentioned below:

1. One of the first things before going ahead with the upgrade to macOS Big Sur is backing up your system. All you need to have is the Time Machine & an external hard drive and in a few minutes, you will be able to backup your mac.

2. Another thing to consider is using the First Aid feature from the Disk Utility app on the mac. You need to start with launching the Disk Utility app on the system & navigate yourself to the First Aid option to look for the errors on the disk. Hopefully the disk doesn’t show any errors while using the Disk Utility app so that the whole transition can be easy for you.

3. Cleaning out the junk or unnecessary items from the mac is extremely important as there are plenty of them on your device. So please delete all those items from the mac to have a smooth transition for the macOS Big Sur update.

How to Update macOS Catalina

Normally, whenever the new system update releases, the system will show the same automatically as a notification. And that’s your hint to go ahead with the update where you need to tap on the notification & click on Install Now option.

However, there are times when you either miss out on those new system updates or are waiting for the reviews from users. Either way, after making the decision of going ahead with the macOS Big Sur update, navigate yourself to the System Preferences > Software Update > Upgrade Now.

Now if you are one of those users who didn’t get a chance to tap on the macOS Big Sur update notification or use the above mentioned path, you can use another option as well. All you need to do is, visit the Apple official website (macOS Big Sur) & download the latest macOS update from the same platform.

Please know that the macOS Big Sur update is a bit over 12 GB, it will take some time for the update to get downloaded. Once the whole “upgrade to macOS Big Sur” file has been downloaded, your mac will start the installation process by launching the installer automatically. The next steps wouldn’t require anything specific from users end as all they need to do is follow the instructions through the installation process. And within a while, the macOS Big Sur update will be installed on the system successfully. The average time it takes to update macOS Catalina to the macOS Big Sur is about 30 minutes so please be prepared to have patience for that much time.

Get Exciting Features With The macOS Big Sur Update

Each & every update on different devices brings many features to explore and at the same time, instant bugs as well. For example, the macOS Big Sur update that brings many features from user interface to exciting features that can give your system a whole new makeover. I strongly believe that once you are all set with this macOS Big Sur upgrade, you yourself will know that the experience cannot be described in words. So without further ado, check if your mac comes under the list of the compatible macbook versions, & if yes then download the macOS Big Sur installation files right away.

Recommended Readings:

Does your iMac, Mac Pro, MacBook Air, MacBook Pro, or MacBook stuck on login screen after update to Big Sur, Catalina, Mojave or High Sierra? That Mac won’t boot is not a new issue but still a tough call for ordinary users to fix it. Well, this article will walk you through the solutions to solve “Mac stuck on boot screen after Big Sur or Catalina update” problem.

File Missing after Mac Stuck on Login?

• Recover files missing or lost due to system upgrade/downgrade,etc.
• Restore formatted, deleted files
• Support recovering data in 200+ formats (audio, video, image, docs, etc.)
• Get back files from mac internal and external hard drive (SD, USB, etc.)
• 5 recovery modes for different situations
• Preview files before final recovery
• Applicable for macOS Big Sur and Catalina

Why Mac Stuck on Login Screen after Update?

• The update of macOS Big Sur or Catalina brings certain incompatibility problem (between Apple default apps and the OS) or unsolved bugs
• Not enough hard drive space
• Corrupted SSD or HDD
• Too many boot items opening at login
• Malware or virus deleted the crucial system files
• File system corruption of Mac partition
• Power issues
• Motherboard Failure
• …

macOS stuck at login screen is a complex issue meaning there’s something bad coming with your Mac system and it needs to be repaired as quick as possible.

The Common Symptoms

The symptoms of “MacBook stuck on login screen after update” issue is different, the familiar ones are those your Mac may stuck on:

• Grey screen
• White screen
• Black screen
• Login loading bar
• Apple logo (loading screen with Apple)
• Startup screen spinning wheel
• Login screen after password
• Startup screen with status bar

Or your Mac:

• Won't boot past apple logo
• Won't load past login screen
• Frozen on the startup screen after macOS Big Sur or Catalina update
• …

By knowing the symptoms, you can safeguard your data to avoid data loss crisis, and then take immediate actions to fix the problem.

How to Fix Mac Stuck on Boot Screen after Update?

Fix 1. Reboot the Mac

Do the most essential things at first, as they don’t require any tech support.

• Shut off your Mac
• Disconnect the whole peripherals except those needed to turn on the system
• Check your charger’s cable (make sure the cable is intact and the port is clean.). If your MacBook stuck on login screen because of battery power, the battery could be thoroughly depleted or malfunctioning.

When everything is ready, boot your Mac with peripherals reconnected.

Fix 2. Reboot Your Mac in Safe Mode

Safe Boot feature is included since Mac OS X 10.2. It minimizes the apps on your Mac to help identify the issue that causes your macOS stuck at login, or any issue correlated with your startup disk. So not only will it restrict your applications, but also check through startup drive.

1. Restart your Mac computer.
2. Press the Power button while holding down the Shift key immediately.
3. Keep it held until you see the Apple logo.

Matters need attention：

• It’s slower to boot Mac in Safe Mode.
• Not all the OS X functions and programs will work when performing Safe Boot (only for troubleshooting).
• Confirm that your Mac hard drive possesses at least 10 GB of free space. If not, empty your Trash bin or move some of largest files & folders to another drive.

Fix 3. Reboot Your Mac in Single User Mode

Just like booting in Safe Mode, the Single User Mode assists to isolate and fix the common problems that can keep your MacBook stuck on login screen from starting up properly. This method is suitable for advanced users who are comfortable with UNIX or has comprehensive knowledge of the command line.

1. Turn on your Mac while holding Command + S key simultaneously.
2. When you see the white text on a black background, release the keys.
3. Enter the administrator password to access to Mac Big Sur or Catalina Single User Mode.

Fix 4. Reset System Management Controller (SMC)

SMC controls a host of important functions in a Mac. It deals with many amusing things, from keyboard backlight, charging, fans, etc. to system performance. That resetting the SMC to original factory settings is an all-in-one solution, which can also fix your iMac, MacBook Air or MacBook stuck on login screen after update.

For desktop Mac, iMac or MacBook:

1. Unplug the power cord.
2. Wait for 15 or 20 seconds, and plug the power cord in.
3. Wait for 5 or 10 seconds, and power on the system again.
4. Restart your Mac.

For Mac laptop:

1. Make your Mac unplugged, and then turn off the power.
2. Hold down the Shift + Control + Option key. At the same time, press and hold down the power button. Hold down all of them for 10 seconds.
3. Re-plug the Mac in and reboot it up.

For old Mac laptop with removable battery:

1. Shut down your Mac > unplug it > remove the battery.
2. Hold down the power button for 5 seconds.
3. Put the battery back in > plug the Mac in > restart Mac.

Fix 5. Reset Nonvolatile Random-access Memory (NVRAM) or Parameter RAM (PRAM)

NVRAM is used to store some settings and access them fleetly. PRAM is similar to NVRAM, and shares the same steps with NVRAM. If you experience issues like Mac stuck on boot screen after update to latest macOS, resetting NVRAM/ PRAM may give you a hand.

1. Shut down your Mac.
2. Turn your Mac, and hold down Option + Command + P + R key together right away.
3. Keep holding until your Mac restarts.

Fix 6. Reboot Mac in Recovery Mode

Recovery Mode was offered since OS X Lion in 2011. It shows you 4 options applied to fix connected drives with Disk Utility, restore data from Time Machine, reinstall macOS and get help online. I guess two of them are likely to repair your macOS stuck at login issue.

Option One. Run First Aid from Recovery Partition

1. Turn off your Mac, and then switch it on.
2. Immediately hold down Command + R keys till an Apple logo appears.
3. Wait for a moment, the OS X Utilities window will show up.
4. Click on 'Disk Utility' option.
5. Locate your Mac drive, and choose it.
6. Click on 'First Aid'.

Option Two: Reinstall macOS

If none of the solutions work out to fix the MacBook stuck on login screen issue, then reinstalling macOS will be the last option.

1. Repeat the first three steps of option one.
2. Select “Reinstall macOS” from the Utilities window.
3. Click on “Continue” and follow the installation process.

Attentions of reinstallation:

• Don’t put your Mac to sleep status.
• Mac would reboot and display a progress bar a couple of times
• After installation, click on “Shut Down” option from the Apple menu to quit Mac Recovery Mode.

Also, you can check the video tutorial as following:

Lost Data after Big Sur or Catalina Update or Issue Repaired? Recoverable!

That Mac stuck on boot screen often comes along with data loss from the hard drive. If you didn’t manage to back up your Mac data before, you won’t be able to recover lost files via Time Machine after macOS upgrade.

Fortunately, Cisdem Data Recovery for Mac- an effective and powerful recovery program, allows you to retrieve a wide range of file formats (Keynote, PDF, JPG, PNG, MOV, RTF, etc.) or any types (video, documents, archive, etc.) of deleted, formatted, corrupted data on Mac. It’s absolutely safe and keeps your data private.

Step 1Install the Software

After the installation, launch Cisdem Data Recovery on Mac.

Step 2Select the Scenario

You will see 5 recovery solutions. To recover lost files after macOS update, you can choose the option 'Basic Data Recovery' (fast scan) or “Advanced Data Recovery” (deep scan) to start performing lost file recovery.

Step 3Choose a Destination

Select the hard disk where your lost files are originally stored and click on “Scan” button” to go on.

Step 4Start to Scan

The “Basic Data Recovery’ mode only takes a minute to finish. If it doesn’t find out your lost data, go to scan again with 'Advanced Data Recovery' mode which searches more files but spends longer time.

Step 5Preview and Recover Lost Files

Once the scanning process is done, all detected contents will be displayed in 'Tree View' categories on the left side. You can preview them for saving your time on data recovering.

Finally, choose the target files and click on 'Recover' button. In no time, your files that lost after “Mac stuck on boot screen” fixed will be retrieved.

Conclusion

Unable To Update To Catalina 10.15.4

It can be troublesome and distraught that your MacBook stuck on login screen after update to Big Sur or Catalina. Worse still, you may lose files in the meantime. We introduce 6 practical solutions to get macOS stuck at login issue fixed, along with 1 data recovery program to restore lost files, but the safest plan is to keep backups of all vital files on Mac.