With macOS Catalina, Apple modified macOS’s construction on a startup quantity. As a substitute of a single commingled set of system and information information, with Apple making an attempt to make sure the integrity and immutability of system information, the corporate break up it into two components: a system quantity and a Information quantity.
The 2 are melded collectively right into a “quantity group,” an organizational technique added in Catalina. Whenever you boot macOS Catalina or later, the startup quantity seems within the Finder as a single entity; behind the scenes, they’re two: “Quantity Title” and “Quantity Title – Information”.
In the event you’re making an attempt to erase your startup quantity fully—say, to promote it to somebody or as a trade-in—you may make use of an simply missed choice in Disk Utility labeled Erase Quantity Group.
To erase your startup quantity group, comply with these steps:
- Boot your Mac into recoveryOS. On an Intel Mac, restart or begin up whereas holding Command-R; with an M1, shut down the Mac, then maintain down the facility button till “Loading startup choices” seems.
- Navigate to macOS Restoration, which can contain deciding on a person account and coming into its password to unlock the startup quantity.
- Click on Disk Utility on the backside of macOS Restoration’s display screen.
- Choose both of the 2 volumes within the container for the system (see determine).
- Click on Erase.
- Be aware that whereas the primary quantity is stuffed in and its identify might be modified, and there’s a outstanding Cancel/Erase set of buttons, look to the lower-left nook for the Erase Quantity Group button. Click on that. (This selection doesn’t seem if in case you have chosen the container or drive on which the amount group seems.)
- Affirm the operation.
Now each your system and Information volumes are deleted, offering a recent begin for a brand new proprietor or new macOS set up.
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