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#MAC SIERRA CLEAN DISK UTILITY HOW TO#
#MAC SIERRA CLEAN DISK UTILITY MAC OS X#
#MAC SIERRA CLEAN DISK UTILITY VERIFICATION#
#MAC SIERRA CLEAN DISK UTILITY PASSWORD#
#MAC SIERRA CLEAN DISK UTILITY FREE#

#MAC SIERRA CLEAN DISK UTILITY FREE#

Most Secure – The most secure option that also takes the longest, this writes data over the free space a total of 7 times.Ĭhoose whichever option is most appropriate for your needs, but it's generally recommended to use the "secure" or "most secure" option if you intend on transferring ownership of a hard drive, or if you suspect a hard drive that once contained important data has the chance of being stolen or misused.

Secure (middle option) – A triple pass erasure, this writes zeros over the unused space three times.

Select Edit > Delete APFS Volume from the menu bar and Delete.

Fastest – The quickest option, this does a single pass write of a bunch of zeros over the unused portion of the hard drive. Press and hold Command + R to start the Mac in Recovery mode.

The three Erase Free Space options are as follows:.

Select the desired level of erasure and choose "Erase Free Space" to begin the process of overwriting the free space on the hard drive.

Choose the "Erase" tab, then choose the "Erase Free Space" option.

Connect the hard drive if it's an external disk, and then select the hard drive from the left side menu.

Launch Disk Utility, found within /Applications/Utilities/ or through Launchpad.

#MAC SIERRA CLEAN DISK UTILITY MAC OS X#

Erasing Free Space on Hard Drives in Mac OS X This option is not available for flash-memory based SSD models (like those bundled within the MacBook Air, Retina MacBook Pro) because those drives use the TRIM function to quickly remove and recover blocks instead, which has the side effect of automatically preventing file recovery fairly quickly – often within 10 minutes of emptying the Trash. This only works on traditional hard drives of the spinning platter variety, which is typical for MacBook Pro, Mac Mini, and iMac models, and is the case with most external hard drives used for backups. Learn more about reinstalling m acOS.The Mac OS X Disk Utility app provides an ability to erase free space on traditional hard drives, which overwrites vacant disk space on the drive to prevent any potential recovery of deleted files (that is, files that have been removed traditionally, rather than through secure methods). Select the Macs startup drive, usually named Macintosh HD, and select the Erase tab in the.

If you want your Mac to start up again from the volume you just you erased, select Reinstall macOS in the utilities window, then click Continue and follow the onscreen instructions. Disk Utility opens, with the Macs drives listed in the left pane.

When done, quit Disk Utility to return to the utilities window. The first utility to learn about is Activity Monitor, which tracks the CPU, memory, energy, disk and network usage of every application or background process running on your Mac.

Optional: If you previously used Disk Utility to add internal volumes other than Macintosh HD, you can erase them individually using the same process.

Select Disk Utility > Continue from the Utilities.

#MAC SIERRA CLEAN DISK UTILITY VERIFICATION#

As before, Disk Utility will take the volume through the Live Verification process. Method 6 Erase Disk & Reinstall MacOS Press and hold Command + R on Macs startup to enter Recovery mode. Click on the drive requiring repairs, then click First Aid again. Once its done, click the Apple logo in the top-left corner of the screen, and click 'Quit Disk Utility.' At this point, if youre just trying to erase your disk, youre done. The familiar Disk Utility window appears. Wait for the macOS Utilities screen to appear, then click Disk Utility. 1.Were going to re-download the installer file for our chosen version of macOS and store it on a USB stick or external drive. Click Delete APFS Volume from the menu bar or click the Remove button in the disk utility bar. Click Disk Utility to select it, then click the Continue button. Hold down the Command and R keys as soon as you hear the Mac tone indicating a reboot. Click Edit in the Mac screens upper left corner in the menu bar. If this button isn't shown, click Erase instead. Select the data disk under the startup disk. Format: APFS or Mac OS Extended (Journaled), as recommended by Disk Utility.Click the Erase button in the toolbar, then enter the requested details:.Select Macintosh HD in the sidebar of Disk Utility.

#MAC SIERRA CLEAN DISK UTILITY HOW TO#

From the utilities window, select Disk Utility and click Continue. This tutorial explains how to download macOS Sierra and perform a clean install, which offers several benefits over the automatic upgrade process included in the installation package.

#MAC SIERRA CLEAN DISK UTILITY PASSWORD#

If asked, select a user you know the password for, then enter their administrator password.Start up from macOS Recovery: Turn on your Mac, then immediately press and hold these two keys until you see an Apple logo or other image: Command (⌘) and R.