In order to use that unallocated space either you need to create a new partition or expand the current partition on the drive.īut, in some rare cases, an entire hard drive becomes unallocated! Yes, at times, your well-functioning hard drive shows up as unallocated all of a sudden for no reason, making all your files and folders stored in it inaccessible. The unallocated space on a hard drive indicates that the space on a disk does not belong to any partition and no data can be written to it. Disk Utility will start formatting the drive.Solution: In some circumstances, existing hard drives (the disk drive which you are using) will also have unallocated space. Warning: Formatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting.Ĩ. Select the non-indented entry for your Seagate drive. Click on the view button in the upper left-hand side, change to Show All Devices. Note: If you do not see the scheme option, then you have selected the volume and not the drive. Select OS X Extended (Journalled) for Format

Select Erase which opens the following window.ĥ. This feature was introduced in macOS 10.13 and not available in 10.11 or 10.12.ģ. The view button is in the upper left-hand side, change to Show All devices.

Note: If you don’t see two entries listed then change the view in disk utility to show the drive and the volume. Open Finder > Applications > Utilities > Disk Utility The following is based on the latest version of macOS.

Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting.

Seagate mac format patch