Mac os disk utility erase greyed out




Your Answer How to erase your MacBook Pro and reinstall macOS

They are part of the Mac and should be included with it. You should be able to erase the disk drive and reinstall the operating system. Page content loaded. Dec 22, 4: Good idea but I didn't have the disk. I had another OS X disk but I couldn't get the machine to boot from it for some reason. Anyway the other solution seems to do the trick, thanks.

Remove Windows Boot Camp Partition with Grey Minus

Although, I have to confess part of me was kind of looking forward to smashing a computer Communities Contact Support. Sign in.


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More Less. Question marked as Solved User profile for user: Enlarge a volume You can also enlarge a volume without losing the files on it.

How to Format or Partition an External Hard Drive for Mac

One caveat here: So this basically works if you have more than two volumes. Also remember that when any volume is deleted, any data on it is erased and lost forever — be sure to have a backup or an empty volume. The erase and partition process destroys all data on all volumes of the device, so make sure you have a backup before proceeding.

Note that you cannot erase the device that contains your startup volume.

Disk Utility Errors and Questions for macOS 10.11 and higher

The latter partition map scheme is used for compatibility with older PowerPC-based Macs. Note that if you just want to erase a disk on a device that is being given away or sold, you should follow the same process through step 4. Before clicking Erase, click the Security Options button to select how many times you want to overwrite the erased data, then click OK.

Related article: Security First: Writing over the data three times meets the US Department of Energy standard for erasing magnetic media, while overwriting it seven times meets the US Department of Defense M standard. Overwriting data for a secure erase takes some time, so be prepared to wait…sometimes for days for larger disk drives. Name required.


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    Restore functionality in Disk Utility greyed out (macOS HighSierra) | Discussion | Jamf Nation

    Notify me of new posts by email. OSX iMac with Used OWC to partition into 2 volumes. It showed this format: Step 1: Open Disk Utility. Step 2: Step 3: By the way, you can also rename your external drive. Step 4: Wait until the erasing process is complete. For me, it took less than a minute to format my 2TB Seagate Expansion.

    Add partitions and allocate volume for each one.

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    After that, you can rename each partition and define a file system for it. Confirm your operation. JP on December 19, at 7: Mona on March 14, at 6: Tim Walsh on January 18, at 8: Once I have backed up my Mac, is it possible to partition the external hard drive? Kshem on February 11, at 3: I too have the same problem under Mac OS Elvis on February 13, at 7: If I have files on my hard drive — how do I format it without losing all the files, pls?

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