Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Can't format former Boot Camp partition [Thread II]

Erased my partition and now Im left with 370Gb of Macintosh HD and 130 of free space, I want to go back to my 500Gb, please help me Loner TUser uploaded file

MacBook Pro, OS X Yosemite (10.10)

Posted on Feb 7, 2015 10:13 AM

Reply
12 replies

Feb 7, 2015 10:53 AM in response to UsernameLalo

Usually, BCA is used to delete Bootcamp partitions, not Disk Utility. BCA will do it correctly and put disk space back. Your encryption status of locked indicates FV2.


You can decrypt it using


diskutil cs decryptVolume

Usage: diskutil coreStorage decryptVolume

lvUUID|MountPoint|DiskIdentifier|DeviceNode

[-stdinpassphrase | -passphrase passphrase]

Start a background decryption process that will convert the on-disk bytes which

back the given logical volume from encrypted back to plaintext. You must supply

a passphrase interactively or with one of the above parameters. After this

command completes, the conversion process will be ongoing; you can check

progress with `diskutil coreStorage list`. The volume must be unlocked.


Example: diskutil coreStorage decryptVolume

11111111-2222-3333-4444-555555555555

Feb 7, 2015 3:05 PM in response to UsernameLalo

If you are booted in Recovery console, some CS verbs may not be available.


$ diskutil cs

Usage: diskutil [quiet] coreStorage|CS <verb> <options>,

where <verb> is as follows:


list (Show status of CoreStorage volumes)

info[rmation] (Get CoreStorage information by UUID or disk)

convert (Convert a volume into a CoreStorage volume)

revert (Revert a CoreStorage volume to its native type)

create (Create a new CoreStorage logical volume group)

delete (Delete a CoreStorage logical volume group)

createVolume (Create a new CoreStorage logical volume)

deleteVolume (Delete a volume from a logical volume group)

encryptVolume (Encrypt a CoreStorage logical volume)

decryptVolume (Decrypt a CoreStorage logical volume)

unlockVolume (Attach/mount a locked CoreStorage logical volume)

changeVolumePassphrase (Change a CoreStorage logical volume's passphrase)


diskutil coreStorage <verb> with no options will provide help on that verb


$ diskutil cs decryptVolume

Usage: diskutil coreStorage decryptVolume

lvUUID|MountPoint|DiskIdentifier|DeviceNode

[-stdinpassphrase | -passphrase passphrase]

Start a background decryption process that will convert the on-disk bytes which

back the given logical volume from encrypted back to plaintext. You must supply

a passphrase interactively or with one of the above parameters. After this

command completes, the conversion process will be ongoing; you can check

progress with `diskutil coreStorage list`. The volume must be unlocked.


Example: diskutil coreStorage decryptVolume

11111111-2222-3333-4444-555555555555


One option is to install OSX on an external volume - OS X: Installing OS X on an external volume - Apple Support and booting from it to erase the internal disk without using the Recovery Console.

Feb 7, 2015 3:48 PM in response to Loner T

Ok, sorry if Im a little bit lost but this is what Im understanding, correct me if Im wrong:

(English is not my native language so I'll be thankful if you give me a step by step guide)


Install OS X on an external volume (Already doing it)

(Here is where Im getting kinda lost)

  1. Restart my computer
  2. Boot from the external volume (my USB) (holding the alt key right?)
  3. I guess that the installer for OX S should open
  4. ?

But... when do I get to decrypt the disk?

Can't format former Boot Camp partition [Thread II]

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.