Image: macOS Update from Catalina to Big SurĬ) Once the software is downloaded, macOS Big Sur installer opens automatically. The steps are as follows:Ī) Go to Apple menu > System Preferences > Software Update.ī) In the Software Update window, click the Upgrade Now button beside macOS Big Sur. When your MacBook, Mac mini, or iMac runs on macOS Catalina, you can get the latest Mac operating system through a software update. The steps to back up your Mac start-up disk are as follows:Ī) Ensure that your Time Machine backup drive is connected to your Mac.ī) Go to Menu bar > Time Machine > Back Up Now.Ĭ) Wait till the Time Machine backs up your Mac to the external backup drive. To prevent Mac data loss due to Big Sur upgrade, you need to back up your Mac using the native backup and restoration application: Time Machine. Read on to learn the correct procedures through which you can install macOS Big Sur safely without losing any of your valuable data. Plus, it features a rehashed Safari, Messaging, App Store, Notes, Photos, and Maps. The operating system brings forth major user interface redesign, and it is the first macOS version to support ARM-based processors. You can now quit Terminal and eject the volume.On November 12, 2020, Apple released its new operating system macOS Big Sur 11 that succeeded macOS Catalina 10.15.

When Terminal says that it's finished, the volume will have the same name as the installer you've downloaded, such as Install macOS Monterey.

After the volume has been erased, you may see an alert stating that Terminal would like to access files on a removable volume.

Terminal shows the progress as the volume is erased.

When prompted, type Y to confirm that you want to erase the volume, then press Return.

Terminal doesn't show any characters as you type.

When prompted, type your administrator password.

If the volume has a different name, replace MyVolume in the command with the name of your volume. Each command assumes that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using.

Type or paste one of the commands below into Terminal, then press Return to enter the command.

Open Terminal, which is in the Utilities folder of your Applications folder.

Plug in the USB flash drive or other volume that you're using for the bootable installer.

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