Once they are downloaded you need to load these installation files onto a USB stick and prepare the USB stick for installing macOS Ventura.

They are over 12GB so expect the download to take a while. If they don’t show up in Software Update you can get the installation files from the Mac App Store. You’ll have to obtain these using a compatible Mac.

First you will need to obtain the installation files for the version of macOS you are after – in this case Ventura.

Before you do anything back up your Mac, just in case.

Update November 2020: Updated for macOS Big Sur.

How to do a clean install of macOS Big SurĪsk now and I'll try to help you before it's too late.

Should you do a clean install of macOS Big Sur?.

But, you have to think about the effect it will have on your immediate workflow before making such a major change. With so many cloud-based storage services, it's much easier than it used to be to do a clean install of an operating system on Mac.

Some people prefer erasing their hard drive and starting over from scratch. Decide whether to do a clean install of macOS Big Sur or carry over your current settings. But, you might need to free up space on your Mac. It isn't a bad idea to keep a partition, especially if you are a fan of beta testing. Make sure you back up the data on your secondary partition to make sure you don't lose anything important. If so, you may have built up a number of files that you'd like to save. You may have decided to create a volume or partition your Mac in order to test drive the beta of macOS Big Sur so as not to mess with your daily driver. If you partitioned your hard drive or created a volume on your Mac to test the beta of macOS Big Sur You may have to backup, erase, and reinstall the software (another reason why you need to back up!) if something goes wrong. The final build of macOS Big Sur should be the same as the Gold Master beta. If you've been running the public or developer beta, you should be able to just update Big Sur as you would normally. All you have to do is click the Software Update button on your Mac's about page. Those installing macOS Big Sur for the first time will have the easiest time downloading the update. If you are running a beta version of macOS How to back up your Mac with Time Machine.If you don't set up some backup system, you only have yourself to blame if you lose all of your data. You should always back up your data before downloading any major updates.

How to get big sur update