How to Delete Partition on Mac Using Disk Utility Open Finder → Applications folder → Utilities. Now, double click on Disk Utility to open it. From the left sidebar, click on the partition you want to delete. Next, click on the partition that you want to delete in the left panel. Screenshot by Matt Elliott/CNET With your partition selected, click the Erase button at the top of Disk Utility. Before beginning, be sure to back up the Mac with Time Machine.This makes it easy to recover everything in the unusual event something goes wrong. It’s also important to remember that this not only removes the Windows installation, but also any files or apps that were stored on the Windows partition, so be sure to backup anything critical on the Windows side of things beforehand too.

Boot Camp Assistant User Guide

You must use Boot Camp Assistant to remove Windows, or a partition that was created with Boot Camp Assistant, from your Intel-based Mac.

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Step 4: Click Restore to remove the Windows partition and restore the disk to a single-partition volume for macOS. The restore process, depending on the size of the partition and drive, may take a. Select the System Reserved partition and then click the Delete button. Click the Yes button to confirm the deletion. If you now wish to resize the Windows partition to use this space, proceed as follows: Select the Windows partition and then click the Slide button. Enter 0 in the Free Space Before box. Click the OK button.

WARNING: Do not use any other utilities to remove Windows or a partition that was created with Boot Camp.

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1. Start up your Mac in macOS.

2. Back up all important data stored on your Windows partition before you remove Windows.

   WARNING: When Windows is removed, the Windows partition—as well as all data stored in the partition—will be erased permanently.

3. Quit all open apps and log out any other users.

4. Open Boot Camp Assistant , then click Continue.

5. If the Select Tasks step appears, select “Remove Windows 10 or later version,” then click Continue.

6. Do one of the following:

   • If your Mac has a single internal disk, click Restore.

   • If your Mac has multiple internal disks, select the Windows disk, select “Restore disk to a single macOS partition,” then click Continue.

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