reportsiop.blogg.se - Erasing and creating failed could not unmount disk

Give your disk the name of the operating system, e.g., Ventura, Monterey, Big Sur. That means you’ll need to grab yourself a 16GB or larger flash drive before you get started.īear in mind - when you download an installer, the disk will be reformatted to suit the operating system you’re trying to run. Ventura’s installer is over 12GB, as was Montereys, and Big Sur’s topped 13 GB. It’s important to use a drive with enough capacity to fit macOS. Generally, though, USB flash drives are favored - they’re small, convenient, affordable, and easy to work with.

Use Terminal to create a bootable installerįor your external disk to run macOS, you can use most external USB drives, including solid-state drives and traditional hard drives.

In this article, you’ll find detailed instructions and answers to your questions on how to make a bootable USB on Mac. You can try out the different tools for free, so download it, and see what you think. MacKeeper can do everything from finding malware to updating your apps for you.

When the scan is finished, review the results, and click Fix items safely.

Select Find & Fix from the menu in MacKeeper.You can do that with MacKeeper’s Find & Fix feature, which will scan your Mac for a variety of different problems. It’s a good idea to keep your Mac optimised when you’re asking to create a bootable USB drive. It’s a handy appliance-even more so if you use a small external flash drive that you can carry in a pocket. You can also use it to reinstall the operating system on a Mac that won’t startup. Such a tool allows you to install any version of macOS on multiple Apple computers easily. Why would you want to create an external boot drive for your Mac? If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.A bootable macOS (previously, OS X) install disk is a portable device containing all the necessary installation files for a selected version of macOS. 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. In the sidebar, select the storage device you want to erase, then click the Erase button. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. 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.