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Here’s How Long the macOS Big Sur 11.2.3 Update Takes



Apple’s macOS Big Sur 11.2.3 update is a small upgrade, but  it could take quite a bit of time to install on your Mac.

macOS Big Sur 11.2.3 is a new point upgrade and the software is available to download right now if you own a Mac that’s compatible with macOS Big Sur.

Like most maintenance upgrades, the software is focused on fixing issues with Macs. In particular, macOS Big Sur 11.2.3 patches up a security issue. 

If you’ll be moving your Mac up from macOS Big Sur 11.2.2, macOS Big Sur 11.2.1, macOS Big Sur 11.2, the macOS Big Sur 11.2.3 download will be fairly large.

If you’re upgrading from an older version of macOS to macOS Big Sur, your download could be a lot larger. The installation could also take a lot longer.

While some of you might want to skip macOS Big Sur 11.2.3 for the time being, most people should install the software right now or at some point in the near future.

If you decide to install macOS Big Sur 11.2.3 on your Mac, you’ll want to set aside some time to get the upgrade properly installed on your computer.

Moving your device from one version of macOS to another can cause problems so you’ll want to monitor the download and installation.

We can’t tell you exactly how long the process will take because it will vary. That said, we can help you approximate how much time you should set aside should you choose to install the firmware on your device.

If you’ve prepared for the move, and you’re on a fast Wi-Fi connection, it could take around 15 minutes to complete.

Backup to Time Machine (Optional)5 Minutes - 1 Day
macOS Big Sur 11.2.3 Download5 Minutes to 20 Minutes
macOS Big Sur 11.2.3 Installation12 Minutes to 25 Minutes
Total macOS Big Sur 11.2.3 Update Time17 Minutes to Several Hours


Make sure you’re prepared before you start the macOS Big Sur 11.2.3 download.

If you don’t know how to properly prepare for a macOS upgrade, take a look at our pre-installation guide. It’ll walk you through the most important steps to take before you initiate the process.

You might be able to get through these steps in 30 minutes, but it all depends on your skill level and the current state of your Mac.

If you haven’t backed up your data in awhile or you if you aren’t familiar with macOS Big Sur 11.2.3, the pre-installation process could take you a lot longer.

You don’t need to follow every single step in the guide, but at the very least you’ll want to make sure your Mac’s data is backed up properly.

macOS Big Sur 11.2.3 Download

Once you’ve prepared, it’s time to start the download process.

Again, the exact size of your macOS Big Sur 11.2.3 download will depend on your model and the version of macOS you’re currently running. If your Mac is connected to a fast Wi-Fi network, the download could finish up in less than 10 minutes.

If your connection is slower, you’re downloading at peak hours, or if you’re moving to macOS Big Sur from older macOS software, you’ll probably be looking at a much longer download process.

macOS Big Sur 11.2.3 Installation

Once your device is done pulling macOS Big Sur 11.2.3 from Apple’s servers, the installation process will begin.

The macOS Big Sur 11.2.3 installation could take around 12 minutes to complete. It took just around that to install the software on a 2017 MacBook Pro.

Your Mac might reboot itself a couple of times during the installation process, but this is perfectly normal. Your device should boot up normally once the installation process completes.


After the installation finishes up, you might need to spend time logging into iCloud, signing into your device’s various apps and services, and/or setting up Apple Pay.

You also might want to spend some time checking your important data (photos, music, etc) to make sure it carried over properly to the new operating system.

After you do that, make sure you test your core applications and services to ensure they’re working normally. If you notice an issue with one or more of your apps, try downloading the latest version. Developers are rolling out macOS Big Sur support updates.

You’ll also want to poke around your Mac for bugs and performance issues. If you notice something take a look at our list of fixes for common macOS problems.

4 Reasons Not to Install macOS Big Sur 11.2.3 & 11 Reasons You Should

Install macOS Big Sur 11.2.3 for Better Security

Install macOS Big Sur 11.2.3 for Better Security

If security is important to you, you should think about installing the macOS Big Sur 11.2.3 update.

macOS Big Sur 11.2.3 brings an important security patch to Mac users. You can read more about it on Apple's website

If you skipped earlier versions of macOS, you'll get the security patches from the updates you skipped with your upgrade to macOS Big Sur 11.2.3. 

The previous version of macOS Big Sur, macOS Big Sur 11.2.1, had three security patches on board. You can read about them over on its security website.

If you skipped macOS Big Sur 11.2, you'll get its patches with your upgrade to macOS Big Sur 11.2.3. 

macOS Big Sur 11.2 included 50+ security patches. You can learn more about these patches over on the company's website. These patches will help protect your computer from harm.

If you skipped macOS Big Sur 11.1, you'll get its 51 security patches with your upgrade to macOS Big Sur 11.2.3. You can read about them right here.

macOS Big Sur 11.1 also included a new privacy information section on App Store pages that includes a developer-reported summary of the app’s privacy practices.

If you're moving up from macOS Catalina, you'll also get macOS Big Sur 11.0.1's 50+ security patches. If you're interested these improvements, you can read about them over on Apple's website.

In addition to those patches, macOS Big Sur comes with additional security and privacy upgrades including improvements to the App Store and Safari. 

In Safari, you can now tap the Privacy Report button to better understand how websites handle your privacy.

With macOS Big Sur on board you can now get information on the App Store that will help you understand the privacy practices of apps before you download them. 

Researchers also discovered that Apple brought a new "BlastDoor" sandbox security system to macOS Big Sur, iOS 14, and iPadOS 14. The system is meant to prevent attacks from occurring via the Messages app. 

You can read more about "BlastDoor" right here



  1. S

    02/02/2021 at 1:56 am

    Seems stuck on ‘Preparing macOS Big Sur 11.2 Update…’ to me

    “About 10 minutes remaining” has been present for about 45 minutes

  2. AndrewH

    02/02/2021 at 7:54 pm

    It’s so frustrating that the 12GB Big Sur takes 7hrs to download on a dish wireless system, so inevitably, when I come to check on it, it has paused and I need to start it again. It’s been restarted at least 5 times….isn’t it smart enough to save what has been downloaded rather than start fresh each time?

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