If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device. If you want to erase your startup disk: Start up your computer in macOS Recovery, then choose Disk Utility in the Recovery app. 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. File system formats Partition schemes Get detailed information about a disk Manage physical disks and volumes. Disk Utility can fix certain disk problems for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn’t work properly, or your computer won’t start up. If you have any files you want to save, copy them to another storage device. Secure erase options are available only for some types of storage devices. Disk Utility can check for and fix errors related to the formatting and directory structure of a Mac storage device. If the drive is to be shared with Windows, then use Disk Utility to erase the physical drive as GUID partition and exFAT. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. I would start over making sure to select the physical drive in Disk Utility and selecting GUID partition and MacOS Extended (Journaled) if the drive is only going to be used with macOS. 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 disk you want to format to use with Windows computers. If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon. In the sidebar, select the storage device you want to erase, then click the Erase button. In the Disk Utility app on your Mac, choose View > Show All Devices. So I click on the Apple SSD volume erase. If I click on anything other than Apple SSD 2D., the erase icon is greyed out. If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon. It’s display shows: Apple SSD 2D512E Container disk 1 Macintosh HD Macintosh HD - Data. In the Disk Utility app on your Mac, select an existing APFS volume in the sidebar, then click the Add Volume button in the toolbar. If the Scheme pop-up menu isn’t available, make sure you selected the storage. Each volume you add to an APFS container can have a different APFS format, if needed. ![]() Click 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. Double-click Disk Utility in the Utilities folder of the Applications folder. 40 years ago I was a wiz with DOS but it has been slowly downhill since with it all a bit less intuitive for me.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. thank you for your patience and help, it really is much appreciated. I have a time machine backup on another Samsung 500 gig SSD of my data that I will than somehow make into an external drive for the 2019 and have all my previous files without loading up the memory of the new 2019. Also I cant erase/format/ (rename (to Macintosh HD) the APPLE SSD using recovery via disk utility. Now what I have in internal is APPLE SSD APO256Q media in disk utility and I cant see any disk to install macOS Monterey into while trying to reinstall OS. So, I would like to install High Sierra on the 2011 so the drive would be the latest compatible, as ultimately the 2011 will go to wife or daughter. I tried to erase and reinstall OS in recovery and mistakenly deleted Macintosh HD. So I attempted to erase the disc and that failed because I was booted up to it. I downloaded High Sierra and attempted to install it but the install failed because of the APFS file error message: could not create Preboot.APFS. I had been running OS El Capitan on the 2011 and had planned to remove the harddrive and use it as an external drive on the 2019 MBP but learned that it would have to run High Sierra for that to work and High Sierra is the latest OS a 2011 will run. I am trying to load High Sierra on my late 2011 Macbook Pro, which has a non factory Samsung 500 gig SSD. ![]() I am communicating with you on my brand new 2019 model Macbook Pro 16, running Catalina.
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