


If the Erase Group Volume button appears, click that to erase all of the volumes associated with the drive.Click Delete APFS Volume from the menu bar or click the Remove button in the disk utility bar.Click Edit in the Mac screen's upper left corner in the menu bar.Select the data disk under the startup disk.Find your Startup disk (it should be named "Machintosh HD" unless you renamed it) in the sidebar.While the startup disc is waking up, hold down the Command+R keys simultaneously.

Once your data is backed up and you've signed out of everything that might connect your old Mac to your personal information, you can erase everything on it by reformatting the hard drive. If you're unpairing a keyboard, trackpad, or mouse on a desktop Mac, be sure to have a wired one plugged in, or you won't be able to type or use a curser, and you'll have to repair it all again.

If you don't have your new Mac yet, you probably shouldn't be selling your old one yet. If you already have your new Mac on hand, you can transfer all of your data from your old Mac or use an older Time Machine backup. A completely fresh-from-scratch Mac is the best way to do this. If you leave behind anything that needs to be logged into with a password, that buyer will have to track you down and get your password to change ownership. It's a security and privacy thing for you, but it's also essential for the buyer. If you're about to sell your Mac, the one thing you don't want to do is give away the data you've been storing on it all these years. Clean the Mac of your personal data before erasing it These directions are based on macOS 13 Ventura operating system. Here's how to reset your Mac before selling it or giving it away.
