The installer has the name “Install macOS ”.For Mac OS X El Capitan, the link downloads a disk image file named InstallMacOSX.dmg. For macOS Big Sur, macOS Catalina, macOS Mojave or macOS High Sierra, the links download an installer directly into your app folder. When this is done you can eject the USB stick.There may be another way, but if you create a USB OS X Install Disk (using a friends mac if you dont have another one around), you can simply boot from.To ensure that you’re getting a valid, un-hacked, and legal version of macOS, you need to download it directly from Apple. The copy process may take a little while, depending on the speed of your thumb drive. Now copy all files to your USB drive (e.g. When the Windows 10 ISO download is done, double click the file to open it.Find the Terminal app in the Utilities folder of your Applications folder. For this article, I used a 2TB USB hard disk drive erased and formatted as Mac OS Extended and given the name Installer. Plug in the USB flash drive or formatted volume you’re using for the bootable install disk.
Make Bootable Usb Drive Mac OS X El CapitanTerminal displays the progress of the erasure.Terminal at the successful conclusion of the createinstallmedia commandDo you have a Mac with Apple silicon? If so, there’s a slightly different process. When you’re asked, type Y to confirm that you want to erase your bootable installer volume, then press Return. Note that for security, Terminal doesn’t display characters as you type your password. You’ll be prompted to type your administrator password and press Return again. Subtitle program for macIt displays all bootable volumes (which should be your installer and the internal drive on your Mac), and a gear icon labeled “Options”. Turn on the Mac and continue to hold down the power button until you see the startup options window. Plug your bootable installer into a Mac that has an Internet connection and that is compatible with the version of macOS you’re about to install. Otherwise, use the instructions for an Intel processor. If it shows Apple M1 or another Apple chip, then follow the Apple silicon instructions. Restart or turn on your Mac, then immediately press and hold the Option (Alt or ⌥) key. Follow the onscreen instructions. The macOS installer opens. With OWC external drives available for as little as $79.75, it’s inexpensive insurance. Click Continue, then follow the onscreen instructions.It’s a great idea to have a bootable install disk available for those rare emergencies when you might need to re-install your Mac operating system and Recovery Mode isn’t working. Select Install macOS (or Install OS X) from the Utilities window. If you’re unable to start up from the bootable installer, then you’ll need to use these instructions from Apple to allow booting from external media. Select the volume with the bootable installer, then click the Up arrow or press Return.
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