Now you've got your file backup, a blank system, and the latest macOS on a USB drive, it's time to bring them all together.
6. First and foremost, if your Mac is powered on, shut it down. Download macOS Big Sur Beta on Your Mac [How to] 1. Install macOS Mojave.
Step 4: Install a new copy of macOS Catalina; Note: If you are reading this article on the Mac you want to perform the clean install with, switch to another device or print this page before continuing so you can read along as you go. Step 1: Back up your Mac. Pensez ensuite à réaliser une sauvegarde de vos données avec Time Machine.Mieux encore vous pouvez réaliser une copie parfaite intégrale de votre disque / partition comme indiqué dans notre tutoriel pour Cloner le disque de son Mac (macOS / Mac OS X) avec l’excellent Stellar Drive Clone pour Mac. There are a lot of advantages when you perform a clean install on your Mac. Step 4: Install New Copy of Mac OS X Mojave using a USB drive. Clean Install macOS Mojave Final Version. Benefits of clean installs; Create Bootable Installer; Reboot and Clean Install of MacOS Mojave on Mac, iMac, MacBook Pro, MacBook Air ; Benefits of clean installs. Click 'Erase' again to confirm. Installer macOS High Sierra (10.13) : sauvegarder ses données / cloner son disque. Then I installed Catalina over that fresh install of Mojave. Page Contents. What I ended up having to do was the Internet Recovery method, which is how I know it will only allow you to install the last installed OS. Connect the USB drive with the version of macOS Mojave to your Mac. Apple's newest OS contains an updated command for a clean install or in-place upgrade of macOS Mojave using just the installer file and one line of code. Select 'Mac OS Extended (Journaled)' under 'Format' if it isn't already.


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