Remember you need to be connected to WiFi as it will download a fresh version of macOS Catalina.Īfter the download is done, it will install the fresh version of the the macOS operating system and you can carry on with the set-up. Here enter what you want to name your hard drive and then confirm by clicking “Erase”.įinally, go back to the main “macOS Utilities” folder and click on Reinstall macOS. Now, select the “Macintosh – HD” volume, click on Erase. Select the second volume (Macintosh HD – Data) and click on the (-) button and select “Delete”. It’s because macOS Catalina runs separately on a read-only system so you cannot make changes to it (learn more here). If you are running macOS Catalina, it will show up two partitions: Macintosh HD and Macintosh HD – Data. Now, you are booted into the recovery mode. Release the keys when the Apple logo appears on the screen. To do that, shut down your Mac and then restart it while holding the CMD+R keys. The first step is to start your Mac in Recovery Mode. With that warning out of the way, let’s get started: And you won’t be able to recover the deleted data. That also means that you should create a backup of your data before proceeding with this tutorial as you will lose all your data. This is also handy when you are selling your Mac to someone as it ensures that no personal data is left on the device. If your Mac is showing its age or having problems, and you have tried all the troubleshooting methods, the final step is to reset it to its original state.
#Startup disk mac restart how to#
You can click on the links below to move to the section you are most interested in.Įrase and factory-reset your Mac Do a fresh install of macOS operating system using bootable drive My experience on going through the process How to Erase and Factory Reset Your Mac #
In the second section, I will show how you can install the macOS operating system using a bootable device. In the first section, I will share the steps of resetting a Mac. Reset Mac and Do a Fresh Install of macOS #
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