![]() Updated December 2019: Everything is up to date through macOS Catalina. If you have any more questions about reinstalling macOS on your Mac, let us know in the comments. How to set up and customize your Mac from scratch Questions? Click Delete APFS Volume from the menu bar or click the Remove button in the disk utility bar. After rebooting and configuring your system download and install macOS Sierra. ![]() If you're starting from scratch, you'll need to set up your Mac from scratch. Open Disk Utility and erase your internal disk Install macOS ( the macOS that came with your Mac, or the version closest to it that is still available will be installed ). Your Mac will now go through the normal macOS installation process, eventually restarting. Enter your Apple ID and password if you're asked to, though you might not be. Despite the macOS version, be it Mojave, High Sierra, or Sierra, this error will.Click on the drive on which you wish to install macOS.How to reinstall macOS while in Recovery mode If you're running macOS High Sierra or later on a Mac with an SSD, your choices will be some form of APFS. Click on the format you want to use for your drive.Click on your startup disk in the Disk Utility sidebar. 1.Were going to re-download the installer file for our chosen version of macOS and store it on a USB stick or external drive. How To Install macOS High Sierra on Unsupported Macs Format a USB drive as Mac OS Extended (Journaled) via Disk Utility. To access the Disk Utility in macOS, just press Command+Space to open Spotlight search, type Disk Utility into the search box, and then press Enter.Select the Macs startup drive, usually named Macintosh HD, and select the Erase tab in the. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device. Disk Utility opens, with the Macs drives listed in the left pane. ![]() Secure erase options are available only for some types of storage devices. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to erase-it’s at the top of the hierarchy.Ĭlick the Format pop-up menu, then choose a file system format. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. You will get a warning that says your data will be. Click the Delete RAID button to start the process. In the sidebar, select the storage device you want to erase, then click the Erase button. With your RAID selected under RAID Sets, the main window shows the status of the array. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Connect the bootable flash drive containing the macOS Sierra installer to. Follow the instructions for how to create a bootable macOS Sierra installer on a USB flash drive. ![]() Option 3: Do a clean install macOS using a bootable. To perform a clean install on the startup drive, first create a bootable copy of the installer, boot from it, and erase the startup drive before installing macOS Sierra. Note: If you want to get your Mac ready to trade in, sell, or give away, and your computer is a Mac with Apple silicon or an Intel-based Mac with an Apple T2 Security Chip, use Erase Assistant. Option 1: Erase content and settings (macOS Monterey and later) Option 2: Do a clean install via Recovery.
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