#Clean install mac os sierra without usb how to

Also ensure that the format is set as APFSВ or Mac OS Extended

Check to make sure youвЂ™ve selected the main drive of your Mac.

After a while, youвЂ™ll see the macOS Utilities menu on the screen.

If your Mac has the T2 security chip, you have to first enable booting via external drives from macOS Recovery

It will take you to the boot menu where you can select the USB drive.

Now turn the Mac back on while holding the OptionВ key.

Turn off the Mac and then insert the bootable USB drive.

Download the macOS Catalina installation file using this link.

Make sure the USB drive is at least 8GB in size, and nothing else is stored on it

You have to create a bootable USB drive.

Save it to the cloud or an external drive

Take a full backup of all your important data.

#Clean install mac os sierra without usb how to

HereвЂ™s how to clean install macOS Catalina from USB drive: Steps to install You might want to clean install macOS Catalina to give your Mac a fresh start without any issues from the previous installation. Alternatively, you can download it directly from the Mac App Store.Д«ut sometimes upgrading macOS from the previous version to the latest one is not the best way. Tap on the Apple icon in the top-left corner of the screen, then go to System Preferences > Software UpdateВ to download it. Upgrading to macOS 10.15 Catalina is pretty simple.

How to clean install the new software update HereвЂ™s the list of Mac devices compatible with the new software update: Is your Mac compatible with macOS Catalina? It has also replaced iTunes with three independent apps вЂ“ Apple Music, Apple Podcasts, and Apple TV. The macOS Catalina brings tons of new features such as the Apple Arcade, Screen Time, Voice Control, Sidecar, and Find My app. You can download and install macOS Catalina if you have a compatible Mac. After months of beta testing, Apple has rolled out macOS 10.15 Catalina to public users.