![]() Step 8: After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Terminal shows the progress as the volume is erased. Step 7:When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal doesn’t show any characters as you type. Step 6: When prompted, type your administrator password. sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled If the volume has a different name, replace Untitled in the command with the name of your volume. Each command assumes that the installer is in your Applications folder, and Untitled is the name of the USB flash drive or other volume you’re using. Step 5: Type or paste one of the commands below into Terminal, then press Return to enter the command. Step 4: Open Terminal, which is in the Utilities folder of your Applications folder. Step 3: Plug in the USB flash drive or other volume that you’re using for the bootable installer. DMG, double-click to mount, then drag the installation file to the Application folder. Step 2: Copy the installation file to the Application folderĪfter downloading, if the. Name: Untitled (This name is optional, subject to change). ![]() ![]() Then Format the USB with the following information: Go to Disk Utility (Click on Launchpad > Other > Disk Utility). macOS Catalina 10.15.dmg (7,5G) | OneDrive | Backup | Backup2ĭOWNLOAD MORE: Download macOS Big Sur DMG file for clean installation (macOS 11) Create a bootable installer for macOS.macOS Catalina 10.15.3.dmg (7,6G) | OneDrive | Backup.macOS Catalina 10.15.4.dmg (7,7G) | OneDrive | Backup.macOS Catalina 10.15.7.dmg (7,7G) | OneDrive | Backup.Apple provides a handy list of compatible Macs, but here we summarize the list: When the new owner starts up the Mac, they can use their own information to complete setup.First, make sure your Mac can run Catalina. If you're selling, trading in, or giving away your Mac, quit the setup assistant without completing setup, then click Shut Down. When installation is complete, your Mac might start up to a setup assistant.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.If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.If the installer offers the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.If the installer asks to unlock your disk, enter the password that you use to log in to your Mac.Click Continue, then follow the onscreen instructions.When you see a window with the option to reinstall macOS, your Mac has started up from Recovery. Then click Next and enter that user's administrator password, which is the password they use to log in to the Mac. If you're asked to select a user you know the password for, select the user.To select a Wi-Fi network, use the Wi-Fi menu in the upper-right corner of the screen. You might be asked to select a Wi-Fi network or attach a network cable.Keep holding the keys until you see an Apple logo or spinning globe.Shift-Option-Command-R: When you press and hold these four keys at startup, macOS Recovery might offer the macOS that came with your Mac, or the closest version still available.Option-Command-R: When you press and hold these three keys at startup, macOS Recovery might offer the latest macOS that is compatible with your Mac.Command-R: When you press and hold these two keys at startup, macOS Recovery will offer the current version of the most recently installed macOS.If none of them work, review the guidelines for using startup-key combinations. Immediately after releasing the power button, press and hold one of these key combinations.Press and release the power button to turn on your Mac.If you're not using a Mac with Apple silicon, you're using an Intel-based Mac.
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