So how to fix macOS Big Sur stuck on 12.18 GB In fact, your download is still in progress - but the system is reading it differently. In this situation, don’t trust the progress bar report - it’s most likely a miscalculation. macOS Big Sur stuck on 12.18 GB out of 12.18GBĪnother common issue is when your download size reaches 12.18 GB and then the download just freezes.

Press Run to remove all the junk files CleanMyMac has found, or click Review Details to find out more.Īs you can see from the screengrab, I was able to save 10GB of disk space in just a few minutes.

Here’s how to use it to free up space quickly. 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. 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. And the best way to do that is to use CleanMyMac X. The simplest solution is to free up more space. 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. You’ll need around 16GB of free space to upgrade to macOS 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. If your first attempt was in the App Store, try Software Update.

Try to download it from the Mac App Store if your first attempt was through Software Update.

Check Apple’s System Status page for information about possible server issues on Apple’s end.

What to do if the macOS Big Sur download is stuck

MacBook Pro and MacBook Air 2013 and later.

If your Mac isn’t on it, it’s unlikely you’ll be able to run Big Sur.

Here’s the list of Macs that are supported by Apple for installing Big Sur.

There’s a conflict in your system preventing the process from completing.

If you don’t run scheduled backups – and you really should – clone your boot drive to an external disk before you start. If not, run a backup using whichever backup tool you usually use.

If you use Time Machine, you can run a manual backup using that. Before you attempt to install any major update to macOS, you should back up your Mac.

Apple software update not working