Format And Install Mac Os

  

How To: Use the Mac OS X terminal How To: Format an external hard drive for Mac OS X How To: Get the Public Beta Preview of Mac OS X 10.11 El Capitan How To: Create a Bootable Install USB Drive of Mac OS X 10.10 Yosemite. In the sidebar, select the storage device you want to erase, then click the Erase button. Click the Scheme pop-up menu, then choose GUID Partition Map. Click the Format pop-up menu, then choose a file system format. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased. Nov 18, 2020 Step 6: Clean install macOS 11 Big Sur. Finally, here’s how to do a clean install of macOS using your USB installer drive: Restart your computer and hold down Option. Go back to the initial screen of Disk Utility. Choose to install macOS from the connected USB drive. Click on Install macOS to confirm your action.

Disk Utility User Guide

In Disk Utility on Mac, you can erase and reformat storage devices to use with your Mac. Erasing a storage device deletes everything on it.

  1. If you have any files you want to save, copy them to another storage device.

  2. Open the Disk Utility app on your Mac using one of the following methods, depending on the type of disk or volume you want to erase:

    • If you want to erase your startup disk: Start up from macOS Recovery, then choose Disk Utility from the Recovery window.

    • If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder.

  3. Choose View > Show All Devices.

  4. In the sidebar, select the storage device you want to erase, then click the Erase button .

  5. Click the Scheme pop-up menu, then choose GUID Partition Map.

  6. Click the Format pop-up menu, then choose a file system format.

  7. Enter a name.

  8. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK.

    Secure erase options are available only for some types of storage devices. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.

  9. Click Erase, then click Done.

Format And Install Mac Os

Sierra

How To Format And Install Mac Os

Note: With a solid-state drive (SSD), secure erase options are not available in Disk Utility. For more security, consider turning on FileVault encryption when you start using your SSD drive.

Format And Install Macos Catalina

See alsoPartition a physical disk in Disk Utility on MacFile system formats available in Disk Utility on MacPartition schemes available in Disk Utility on MacFormat a disk for Windows computers in Disk Utility on MacApple Support article: How to erase a disk for Mac