Having spent some years coding applications for macOS we’ve created a tool that everybody can use. The all-round problem fixer for Mac.

So here’s a tip for you: Download CleanMyMac to quickly solve some of the issues mentioned in this article. But to help you do it all by yourself, we’ve gathered our best ideas and solutions below.

The latest version of macOS, Big Sur, has lots of new features and improvements, and most of us want to install it as soon as we can. Most of the time, everything works out, and we’re up and running very quickly. Sometimes, however, it doesn’t go well, and you see a message saying that the macOS installation couldn’t be completed. What do you do then? We’re glad you asked because we have some answers below.

Before you attempt to install any major update to macOS, you should back up your Mac. If you use Time Machine, you can run a manual backup using that. If not, run a backup using whichever backup tool you usually use. If you don’t run scheduled backups – and you really should – clone your boot drive to an external disk before you start.

Here’s the list of Macs that are supported by Apple for installing Big Sur. If your Mac isn’t on it, it’s unlikely you’ll be able to run Big Sur.

If you see a message telling you that macOS cannot be installed or Big Sur is stuck on the progress bar, try the following.

You’ll need around 16GB of free space to upgrade to macOS Big Sur. However, even if you have more than that, your Mac may tell you that you can’t upgrade because it thinks you don’t have enough free space. This can happen for a number of reasons. The simplest solution is to free up more space. And the best way to do that is to use CleanMyMac X.

This app makes it very quick and easy to free up several gigabytes of space by getting rid of junk files that clog up your Mac. It can also be used to uninstall applications, identify large and old files, illustrate what’s taking up the most space, and even protect your Mac from malware. Here’s how to use it to free up space quickly.

As you can see from the screengrab, I was able to save 10GB of disk space in just a few minutes.

As an alternative, you can also use Apple’s built-in storage management tool to free up some storage space.

Sometimes launch agents, login items, or extensions that load when your Mac boots can cause problems when installing a new version of macOS. To check whether that’s the problem, you can restart your Mac in Safe Mode and then try updating it to Big Sur.

CleanMyMac X can also help manage and remove launch agents and login items. Choose the Optimization module in the sidebar to get started.

There are lots of reasons why your Mac won’t update to Big Sur. Thankfully, most of them can be fixed. If you follow the steps above, and particularly if you use CleanMyMac X to help, you should have it installed and running in no time.

Source: https://wcregisteronline.com/2020/10/23/what-to-do-if-your-mac-wont-update-to-big-sur/

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