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Select Container disk 2 in the sidebar and click the Erase icon in the toolbar.The Mac’s startup Fusion Drive should be listed in the Disk Utility sidebar:ġ The disk identifier may be another number. In the top-left corner of Disk Utility, click the View dropdown and select Show All Devices.Having started your Mac in Recovery Mode, open Disk Utility.IMPORTANT: Performing these steps will erase all the data on your Fusion Drive. However, they are still relevant when running macOS Mojave with an APFS-formatted Fusion Drive providing you first perform these extra steps: The instructions detailed in this article are only applicable to HFS+ Fusion Drives. Since the release of Mojave, installing or updating macOS from an earlier version has forced startup Fusion Drives formatted as HFS+ to be automatically converted to APFS as part of the install process. Time Machine remembers the backup disks it was using.Information for Fusion Drive Macs Running macOS Mojave (10.14) Wait a few minutes to allow local snapshots to be deleted.

In macOS Monterey or earlier, deselect ”Back Up Automatically," or use the Off/On switch, depending on what you see.In macOS Ventura or later, click Options, choose Manually from the "Back up frequency" pop-up menu, then click Done.Turn off automatic backups in Time Machine settings:.Or in macOS Monterey or earlier, choose Apple menu  > System Preferences, then click Time Machine.Or in macOS Ventura or later, choose Apple menu  > System Settings, click General in the sidebar, then click Time Machine on the right.Choose Time Machine settings (or preferences) from the Time Machine menu in the menu bar.If you want to delete local snapshots manually, turn off automatic backups temporarily: In fact, your Mac counts the space used by snapshots as available storage.Įven so, Time Machine stores snapshots only on disks that have plenty of free space, and it automatically deletes snapshots as they age or as space is needed for other things. You don't need to think about how much storage space local snapshots are using, because they don't use space needed for tasks like downloading files, copying files, or installing new software.