#CLEAN INSTALL MAC OS SIERRA WITHOUT USB HOW TO#
#CLEAN INSTALL MAC OS SIERRA WITHOUT USB UPGRADE#
#CLEAN INSTALL MAC OS SIERRA WITHOUT USB DOWNLOAD#

Enter your previous Apple ID when prompted if you wish. Once it is done downloading and installing Mojave, you will be prompted with the usual Welcome setup assistant that comes with brand new devices.

#CLEAN INSTALL MAC OS SIERRA WITHOUT USB DOWNLOAD#

You have now basically wiped your SSD of the old OS and all of the user files and data, and your computer will now start to download the latest OS from Apple servers (instead of installing it from a bootable drive). During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time. Allow installation to complete without putting your Mac to sleep or closing its lid. The process of downloading and installation could take a few hours depending on your internet speeds. Once that's done, go back to the main screen (macOS Utilities), and select Reinstall macOS to reinstall a new copy of the latest macOS compatible with your Mac (in this case Mojave).Д¬lick Continue, then follow the onscreen instructions to choose your disk and begin installation (you may be prompted to unlock your disk, simply enter your login password).

#CLEAN INSTALL MAC OS SIERRA WITHOUT USB HOW TO#

To wipe the SSD drive completely, you need to first navigate to Disk Utility (and click Continue in bottom right corner of window).ДЇollow the Apple instructions on How to erase a disk. You will now startup in macOS Recovery, and should be seeing a macOS Utilities window with 4 menu options ( image). Connect to the 5Ghz if you can since it will be faster, but 2.4GHz is fine.

You will be asked to connect to your WiFi network.

Keep on holding the key combination until you see a spinning globe. (Install the latest macOS that was installed on your Mac). If you already have Mojave installed (either the computer came from the factory with Mojave installed, or you installed it yourself from the App Store), and you wish to clean install Mojave, that is already installed:Д«oot up, and immediately hold down the key combination Command + R. (Upgrade to the latest macOS compatible with your Mac).

#CLEAN INSTALL MAC OS SIERRA WITHOUT USB UPGRADE#

If you are still running on High Sierra (or an earlier compatible OS, in which case the steps may vary slightly, read the Apple documentation linked below) and have not yet installed Mojave, and you wish to upgrade to Mojave:Д«oot Up, and immediately hold down the key combination Command + Option + R. Make sure that your Mac is charged up and connected to an outlet. Make sure that your Mac is able to connect to a reliable WiFi network (preferably bring your mac close to the router and make sure it can connect to the router's 5GHz network if possible). Make sure that you have a few hours of spare time. Back all of this up with an online services (Dropbox, gmail, google drive), with a USB drive, or by connecting it to another computer. ) just to save you the trouble of re-downloading them all. dmg files that you used to install apps (e.g. Back up all important files on your computer, and take note of your settings.

Clean install mac os sierra without usb