How to Increase a Partition BootCamp without Deleting the Windows


Increasing partition BootCamp without deleting the Windows 10.


If the machine is already in Windows 10,  it requires to boot back to OS X. To do this, just click icon BootCamp on the task bar and right click and select Restart in OS X. Or alternatively, just shutdown the machine. Restart the machine and press Option button till come up a boot option and select OS X one.

OS X Environment

Before proceeding, please do the backup using TimeMachine. The first attempt that we did, we have to rebuild the OSX and BootCamp.

Open up Disk Utility by going to Finder > Utilities

Under Disk Utilities windows, select the entire disk and then select partition option.

Decrease the size disk and click Apply button.

Wait for the process to complete.

Once it done, shutdown the machine and boot as Windows 10. While restarting the machine and press Option button till come up a boot option and select Windows 10 disk one (harddisk icon).

Windows 10 Environment

In Windows, the extra space sets volume automatically to volume (Drive). You need to delete this volume first. To do this, go to Disk Management and select the extra drive and right click and select Delete Volume option.

Install MiniTool Partition Wizard Free Edition

Select the Bootcamp partition and right click and select Extend option.

Select all the maximum of the disk and click OK button.

On confirmation windows, select Yes to proceed.

Boot the machine.

Wait the proceed to complete.

Let boot to Windows and login.

Check the disk space in Disk Management.



  • Apple OS X
  • Microsoft Windows 10
  • Apple iMAC
  • MiniTool Partition Wizard Free Edition Version 9


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