Unable To Partition Hard Drive Mac Os

  

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If you have previously partitioned your Mac's hard drive in order to download a macOS beta or install Windows, but now you need that storage space back, you can remove the partition and recapture the much-needed space. Here's how.

'Andrew U' has it right. Sounds like the disk is active (mounted). Reboot the Mac force the Mac to boot from the DVD and start a new install. If the disk you are installing on already had data and partitions, either choose the Erase and Install method or do it manually. I am having a similar problem. I have a new MacBook Pro (Sierra) and want to use an external drive for Photos. I have a new Toshiba 500GB external drive that was NTFS out of the box. I want to format it to Mac OS Extended (Journaled), and partition it into two 250 GB partitions, one for Photos library, the other for Time Machine.

Getting rid of a secondary partition on the Mac is a two-step process. After erasing a partition, you can then remove it from your system.

Before you start

The most important thing to do before making any changes to your hard drive is to back it up. Time Machine has the easiest way to back up your data if you don't already have a system in place.

How to erase a partition on your Mac

Make sure to restart your computer in your main partition to erase additional ones.

  1. Open Finder from your dock.

  2. Select Applications.

  3. Scroll down and open the Utilities folder.

  4. Double-click to open Disk Utility.

  5. Select the partition you wish to erase.
  6. Click Erase.
  7. Click Erase to confirm you wish to erase the partition.

  8. Defrag apple mac hard drive. Click Done to continue.

How to remove a partition on your Mac

Drive

After following the steps to erase a partition, you can then remove it from your hard drive.

  1. Select your main partition, which is the first drive on the list. It might be called 'Fusion' or 'Macintosh HD.'

  2. Click Partition.

  3. Select the partition you wish to remove from the graph.
  4. Click the minus (-) button.

  5. Click Apply.

Disk Utility will check the disk and make changes. This will take several minutes.

Any questions?

Unable To Partition Hard Drive Mac Os Download

Do you have any questions about how to erase and remove a partition on your Mac? Let us know in the comments and we'll help you out.

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Unable To Partition Hard Drive Mac Os X El Capitan

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