Apple made it easier to resize partitions—logical divisions of a disk drive into separate mountable volumes with different properties—several releases of macOS ago. How to partition a Mac hard drive or SSD, or create a APFS volume. But a popular scenario would be to use this volume to install an alternate version of the Mac operating system on. Mar 31, 2020 Highlight the drive again in Disk Utility and click Partition instead. Step 6: On the following screen, click the small “plus” button located under the blue pie chart to add a second partition. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button. In the pie chart, select the partition you want to delete, then click the Delete button. The partition is removed, reformatted, and all free space is assigned to the previous partition.
Partitioning a disk on a Mac is an effective way to organize your data into different categories. However, the main concern is that most external hard drives and USB keys come formatted for Windows, which is primarily for PCs. By default, a Mac runs a different file system, so it may bring issues while partitioning your disk on Disk Utility.
Hard drive partitioning is a common issue discussed in many tech forums. In a thread on Apple’s support forum, users complain that their Mac Disk Utility partition grayed-out while trying to partition their external hard drives.
Probably, you just bought your external hard drive and are eager to use it on your Mac. But somehow, you cannot access the Mac Disk Utility partition, so you can’t write data to the drive.
Fear not, we have a solution to this problem. In this post, we will guide you through a step-by-step process on how to restore a grayed-out Disk Utility partition. Many Apple users who have faced Partition grayed out in Mac issues eventually partitioned their external hard drives with the help of these fixes.
Why Partition Grayed Out in Mac (Plus Solution)
Problem 1: Sometimes, you cannot access the Mac Disk Utility partition because your hard drive doesn’t have sufficient space.
Solution: If you want to go ahead with the partitioning task, you need to create more space on your hard drive. In other words, you have to erase the data on your drive to create additional space. You can then format your hard drive using GUID Partition Table. After that, go ahead with your partitioning plans.
Important Note: Before formatting your hard drive, back up your most important files. Needless to say, the process will get rid of all the data on the disk, so you risk losing your files for good.
Problem 2: As mentioned earlier, external drives are usually not compatible with macOS, which may bring issues when you want to partition. In most cases, users choose the wrong partitioning option, and as a result, the Partition option in Disk Utility remains grayed out.
Solution: The right way you should follow when selecting a partition option is to choose the drive name within the list provided under Internal or External (depending on the device you want to partition). Your hard drive will be available on the left side of the Disk Utility pane.
How to Restore Grayed Out Disk Utility Partition: Format Your Hard Drive to Work with Mac
To format your external disk to be compatible with macOS, connect your hard drive to the Mac and follow these steps:
If it reads “Mac OS Extended (Journaled)”, congratulations, you successfully restored the grayed-out Disk Utility and your hard disk is now compatible with macOS.
Partitioning Your Hard Drive on Mac
Now that you have prepared your hard drive to work with Mac, the next step is to partition it on your Mac by following these steps:
Pro Tip: If the main reason for partitioning your hard drive is to install Windows, Apple recommends that you use Boot Camp Assistant instead of Disk Utility. You should, however, note that you cannot use Disk Utility to erase a partition generated using Boot Camp Assistant.
What Else Can You Do to Resolve Common Mac Issues
If you are like many users, partitioning a hard drive on Mac may not be the only challenge you have had with your computer. Mac users have also reported slow performance, random freezes, and space issues. The best way to guarantee the best performance for your Mac is to scan and clean the computer. Outbyte MacRepair helps you to optimize your Mac for peak performance by checking for and cleaning up junk files, unnecessary apps, and other space hogs that may affect your Mac’s memory.
We hope the above solutions helped you to restore the grayed-out Disk Utility partition. As always, we would love to hear your success story. Share it in the comment section. Also, let us know if you experienced challenges during the partitioning process.
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Disk Utility User Guide
Partitioning a disk divides it into individual sections, each of which acts as a separate volume.
However, with APFS, you shouldn’t partition your disk in most cases. Instead, create multiple APFS volumes within a single partition. With the flexible space management provided by APFS, you can even install another version of macOS on an APFS volume.
Mac Os Partition External Drive
Important: If you’re partitioning your internal physical disk because you want to install Windows, use Boot Camp Assistant instead. Do not use Disk Utility to remove a partition that was created using Boot Camp Assistant. Instead, use Boot Camp Assistant to remove the partition from your Mac.
Add a partition
Important: As a precaution, it’s best to back up your data before creating new partitions on your device.
After you partition a storage device, an icon for each volume appears in both the Disk Utility sidebar and the Finder sidebar.
Delete a partitionMac Os Partition Is Missing From Boot Camp
WARNING: When you delete a volume or partition, all the data on it is erased. Be sure to back up your data before you begin.
Erase a partition
Enlarge a partition on a storage deviceMac Os Partition Ssd Drive
If you have multiple partitions on a device and one of them is running out of space, you may be able to enlarge it without losing any of the files on it.
To enlarge a volume, you must delete the volume that comes after it on the device, then move the end point of the volume you want to enlarge into the freed space. You can’t enlarge the last volume on a device.
WARNING: When you delete a volume or partition, all the data on it is erased. Be sure to back up your data before you begin.
Partition Drive Mac
Mac Os Partition External Drive
See alsoFile system formats available in Disk Utility on MacAdd, delete, or erase APFS volumes in Disk Utility on MacAbout Disk Utility on Mac
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