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#Erase greyed out for cd disk utility mac for mac
#Erase greyed out for cd disk utility mac mac os
#Erase greyed out for cd disk utility mac password

If you need to go between Mac and Windows then you would want to select ExFAT.

#Erase greyed out for cd disk utility mac mac os

For example Mac OS Extended (Journaled) or APFS.

#Erase greyed out for cd disk utility mac for mac

If you are using it for Mac only then select a format specifically for macOS.

To resolve this, you must first erase the disk and set the Scheme to GUID Partition Map. If you hover your mouse over the partition button you can see the tooltip provided by Apple. The button is greyed out because the drive is set up as MBR which is typically used for drives less than 3 TB. This was first seen in macOS 10.11 (El Capitan) and has continued. If you will be going between Mac and Windows then there should be no issues. If you plan on using the drive for Mac only then you will want to erase the disk. For more technical information see Microsoft documentation - here. This is typical and not an issue when using the drive as NTFS. It is shown as Microsoft Reserved in Disk Utility. This volume exists because the drive is set up for Windows using GUID/ NTFS. What is that 134.2 MB volume on the drive? Which is why selecting the non-indented entry is important when formatting the drive. This is important because when erasing the drive you will get different options depending on whether you have the volume or disk selected. The indented entries directly below are the volumes (partitions). The non-indented entry is the physical disk which typically has Media in the name. You should see at least two, sometimes three, entries for your drive depending on how it is formatted. If you are running 10.12 or 10.11 this step is not required as the option is not available. Change the view to Show All Devices instead of the default which is Show Only Volumes. If you are running macOS 10.13 (High Sierra) or later it is important to change the view in Disk Utility. 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. Not sure what version you are using? Click here to determine your version of macOS. This article applies to the following versions of macOS: The following is not an exhaustive list of error messages, so you may not find your specific error here.

If you want to start up again from the disk you've erased, select Reinstall macOS in the utilities window, then click Continue and follow the onscreen instructions to reinstall macOS.This article covers some of the common error messages and questions you might encounter while using Disk Utility.

Quit Disk Utility to return to the utilities window.

After the erase process has been completed, select any other internal volumes in the sidebar, then click the delete volume (–) button in the toolbar to delete that volume.ĭuring this step, disregard any internal volume named Macintosh HD or Macintosh HD - Data, as well as any volumes in the External and Disk Images sections of the sidebar.

If you can't see this button, click Erase instead.

Format: APFS or Mac OS Extended (Journaled), as recommended by Disk Utility.

Click the Erase button in the toolbar, then enter the requested details:.

Select Macintosh HD in the sidebar of Disk Utility.

From the utilities window, select Disk Utility and click Continue.

#Erase greyed out for cd disk utility mac password

If asked, select a user you know the password for and enter their administrator password.Start up from macOS Recovery: turn on your Mac, then press and hold Command (⌘) and R immediately until you see an Apple logo or other image.