Click the Erase button or tab, then complete these fields: Enter a name for the disk or volume, such as "Macintosh HD". Disk Utility shows a compatible format by default.
Format an External Hard Drive or USB Flash Drive for Mac OS X
Click Erase to begin erasing. Quit Disk Utility when done. Why to erase a disk You can erase a disk or a volume on that disk at any time, including in circumstances such as these: You received a message that your disk isn't readable by this computer. The macOS installer doesn't see your disk or can't install on it.
Disk Utility for macOS Sierra: Erase a volume using Disk Utility
For example, the installer might say that your disk isn't formatted correctly, isn't using a GUID partition scheme, contains a newer version of the operating system, or can't be used to start up your computer. Which format: Identify the current format If you want to know which format is currently in use, use any of these methods: Select the volume in the Disk Utility sidebar, then check the information on the right.
The File System column on the right shows the format of each volume. The Get Info window shows the Format of that volume.
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Check once and then check again to make sure you can get everything back again. Make sure to deauthorize any apps—such as iTunes or Photoshop—that you're going to download afresh, because your newly wiped computer is going to be viewed as a new machine. Dropbox finished syncing?
Power cable attached? Pictures of the kids somewhere safe?
What’s the Difference Between APFS, Mac OS Extended (HFS+), and ExFAT?
Then you may proceed. Click on Disk Utility then Continue first of all to get your Mac's hard drive wiped. Select Erase and then confirm your choice.
amatvares.gq Follow the instructions that appear on screen, license agreements and all, and choose the hard drive to use in most cases it'll be the only one available. Along the way you can sign in with your Apple credentials to get your apps and iCloud links back again.
How to erase a disk
You're going to be looking at about an hour's worth of reinstalling time but after that you're good to go and ready to enjoy your good-as-new Mac OS X experience. You might find that some of those apps and shortcuts you had installed weren't actually that useful after all. Open adampash.