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14

If I understand your question correctly you are trying to resize the volume group or actually one of the volumes within a group. From what I could gather your disk was converted to a CoreStorage Volume. Could you please verify that by issuing the following command in a terminal and check if you get a similar output to the one in the picture: diskutil ...


10

If your partition turned into Logical Volume Group (you can't resize or delete Yosemite partition), you can revert partition type with few command line. Open Terminal type "diskutil corestorage list" Find Yosemite partition UUID string. type "diskutil corestorage revert " Your Yosemite partition is now revert to default partition type. Now, you can resize ...


8

I had the same issue since the beta and the official release did not solve this issue. In the terminal I had the following output: diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *251.0 GB disk0 1: EFI EFI ...


8

The following diskutil cs resizeStack command is vastly undocumented and as such potentially destructive. There might be an easy way outlined first and a long winding, time consuming hard way. Please backup your Mac OS X before proceeding. The not-as-long-as-expected way: A 2nd computer or an iPhone with the stackexchange credentials to enter the site ...


8

After gaining some experience with CoreStorage volumes, I reworked my first answer to generalize and facilitate it by adding some scenarios and deleting some dispensable steps. Basically there is one undocumented command to resize or expand a CoreStorage volume group and an inherent logical volume: diskutil cs resizeStack LVUUID size The command ...


7

To be able to create a multi-boot environment you have to revert from a CoreStorage partition layout to a standard partition layout. Start to internet recovery mode by pressing altcmdR while booting. Open Terminal.app in the menubar Utilities → Terminal enter diskutil cs revert LVUUID and hit the ⏎ key. (LVUUID is the Logical Volume UUID. You get it by ...


6

Yes you can repartition without losing data. Using Disk Utility, perform a repair on your drive to make sure the drive is free of errors (even better, use Diskwarrior if you have a copy). Then unmount your drive but don't eject it. Select the drive in the left hand pane, then go to the Partition tab. On the Partition Layout section click on the "+" to create ...


6

I highly recommend completely backing up the machine before attempting this, either using TM with no exclusions set, or better yet, cloning the whole drive using a program like Carbon Copy Cloner. Unmount the Logical Volume: sudo diskutil unmount force /dev/disk1 Remove the Logical Volume Group and all of its contents: sudo diskutil cs deleteLVG ...


5

Quick fix: Fake Bootcamp. "I partitioned the free space (that OS X couldn't use) as MS-DOS, Bootcamp Assistant thought it was Windows, and was able to remove this MS-DOS partition and restore Mac OS to a single partition." This is the easiest solution, so try that first. No luck? Long fix: In my case, I couldn't get Disk Utility to create the ...


5

Theoretically everything is fine with your Fusion Drive. Fusion Drives look like this. Disk0 is your SSD with 121 GB and disk1 is your HDD with ~1 TB (~1.121 TB summed up). The larger parts of your SSD (disk0s2) and your HDD (disk1s2) are pooled to a CoreStorage LVG (Fusion Drive: disk3) with a size of 967.8 GB. The rest is reserved for EFIs, a Recovery HD ...


4

It seems that i did it using this post Unable to Resize Partitions and your comment. Although it wasn't obvious for me, what I did was this: diskutil corestorage resizeStack LOGICAL_VOLUME_UUID 0G 0G to expand it to the maximum available space that is free. diskutil corestorage resizeStack can provide with info.


4

The Mac hardware stores the boot volume in NVRAM so you could power off the computer and then reset things by holding the Command Option P R keys down. Once you've heard two boot chimes you can release things and if the Mac OS X volume is viable it will boot first. If that doesn't work then it's likely that the OS X volume has issues and the system is ...


4

I also asked on the developer forums and got an answer there (iOS/OS X dev account required to view). The solution was to boot into a recovery partition (⌘ + R), and change the boot disk from the Apple menu. It needed to be changed to my Mavericks install instead of my Yosemite install.


4

Are you aware of this thread at Apple Support Communities? https://discussions.apple.com/thread/6601122 According to this, Yosemite changed the way the Recovery Partition works when you have Core Volumes. It no longer shows in the list of drives when you boot with the option key pressed. The way to do it is by pressing Command-R. I don't have Fusion ...


3

This Mac Book Retina was originally delivered with Mountain Lion. The upgrade history contains Mavericks, several Yosemite DPs and finally the Yosemite GM Candidate. One of the Yosemite Developer Previews transformed the previous Apple_HFS partition into a Logical Volume Group. The (only) Logical Volume is not revertible: The Boot Camp assistant can't ...


3

I had a similar problem. I created a 30 GB partition and after deleting it there was unused space. I couldn't manually get the original full partition back because of disk errors. So I booted into Recovery (Command + R), repaired the disk with Disk Utility and then the resize to original was no problem. Rebooted and now back to normal. Had no need to ...


3

There are at least two approaches to solve your problem: One is potentially destructive, vastly undocumented and i don't know if it works (1) and the other one is for sure destructive (2). So please backup your Mac OS X and your Ubuntu partition if necessary. Requirements: USB thumb drive with a full working Mac OS X and iPartition installed or a Linux ...


3

If your Mac OS partition is encrypted with FileVault 2, it will be unreadable when you are booted to Windows. At that point, the only thing malware could do to this partition would be to wipe or delete it.


3

I have run Mavericks/Yosemite on a 64 GB SD card and after a clean install, there was about 20-30 GB free. I would say that you could install Yosemite on a 20 GB partition, but I would not recommend anything less than 30 GB.


3

Instead of rebooting constantly to test software in different environments, try a virtual machine. I use VMware Fusion. Major advantages include suspend rather than shut down, and you can have as many as you have disk space for. You can have as many running simultaneously as you have memory for, and you don't need extra hardware to handle different versions ...


3

You can't use filesystem commands (cp, mv, ls, etc.) on devices (/dev/*). If you want to copy everything, bit-for-bit, from volume to volume, you'll need an app like Super Duper or Carbon Copy Cloner.


3

Yes! As the disk is the correct format, it will show in the disk list in the installer (click Show All Disks). You can install any version of OS X on a partition of the correct format, regardless of where the partition is located. The OS X installer doesn't partition the disk for you though; do this first in Disk Utility.


3

I have never, and I mean never, even back to the "classic" Mac O/S days (going back to system 6) partitioned a drive into smaller chunks. Performance gains were supposedly about different parts of a rotational drive being faster than others (EG quicker seek to sectors near the physical hub). There may also have been some O/S speed gains in some O/S if you ...


3

I am astonished about complexity of this problem (see @klanomath answer) and easiness to create it. So I tried to play with it and find a work around and succeed. My problem was the following: I had 500GB disk on which I created 150GB Macintosh HD and 350GB of "free space" using Disk Utility. When I tried to format the free space and pressed Apply it ...


3

To delete CoreStorage volumes you have to use the CLI: please backup your volume "mainHD" boot to Internet Recovery Mode (hit altcmdR immediately after the start-up chime) open Disk Utility and check/repair mainHD quit Disk Utility , open in the menubar Utilities/Terminal.app and enter diskutil cs deleteVolume LVUUID to delete the Logical Volume in your ...


3

To rename the Recovery Partition, falsely named "EFI Boot", I first mounted the Recovery HD, by showing all partitions in Disk Utility. To show all partitions: 1.) quit Disk Utility 2.) In Terminal write or paste: defaults write com.apple.DiskUtility DUShowEveryPartition 1 and hit 'enter'. Launch Disk Utility and mount the hidden, but now showing "Recovery ...


2

OS X Yosemite automatically converts hard drives to Core Storage volumes, whose sizes can't be changed. You need to undo the Core Storage conversion. Here are instructions for making that happen. (source - this method worked for me). This method should be non-destructive, but as always, take a backup first! Boot into Recovery HD. If for any reason you ...


2

Your Recovery HD doesn't occupy your whole 3 TB drive. It's disk1s3 in the diskutil listing with the common size of 650 MB. Your Logical Volume Family and the Logical Volume vanished though. To rebuild it start to your Recovery HD or to Internet Recovery Mode, open Terminal and enter diskutil cs list. Copy the LVGUUID To recreate the LV enter diskutil cs ...


2

The problem turned out to be the PMBR. My first attempt was to copy sector 0 off a GPT formatted memory stick. Examined that with fdisk and it had partition of type EE, but start and end cylinders were the same. I edited partition 1 and accepted defaults. fdisk on mac will report "can't get exclusive access to write sector back, reboot required" It ...


2

Although I don't know what specific property of HFS+ allows a user to modify the current system partition while in use; my expectation would be that operations to blocks of storage that the filesystem is not currently utilizing are allowed. Now if you tried to shrink the system partition below the current size of your system installation (the blue shaded ...



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