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I would suggest the Profile Management option that is included in OS X Server. It has all of the described above features and it is really easy to operate with. Take a look at https://www.apple.com/ca/osx/server/ it's $22.99 CAD.


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Here are instructions for undoing a Core Storage conversion (source - this method worked for me). It should be non-destructive, but as always, take a backup first! Boot into Recovery HD. If for any reason you don't have Recovery HD, then you'll have to make a bootable Yosemite drive and boot into that. In the Menu Bar, select Utilities > Terminal. Run ...


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I had the same "waiting for disk to reappear". it was the Hard Disk cable. it's easy to replace, once you take the HD out. Cable cost around $40 on ebay.


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The reason is that with OS X Yosemite, the internal OS X installation is converted to a Core Storage volume, which is still not fully supported by Disk Utility. There is a way to do it on the command-line, but I'd suggest first partitioning your drive using Boot Camp Assistant, then quit once partitioning is complete. This will give you a volume to work ...


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Just me! Apparently choosing a password not as soon as possible assigned me another user (former user127893, now user128454) but still same username and almost similar avatar (a quarter or the former with a more visible Triforce :D ) BTW recently I tried to run a Disk permissions check and repair. After that I repeat the Verify Disk and the error message ...


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Have you tried asking disk utility to redo the partition map? Click on the disk, go into the "partition" tab, set it from "Current" to "1 Partition", click "Options", change the partition table to anything else, then repeat the process and set it back. If the issue is the partition table, that will fix it. If the issue is the drive, then it won't. Either ...


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You can install Yosemite on an encrypted partition. To use encryption, you also have to use core storage. If you do not use encryption, then the use of core storage is optional. If you encrypt after installing without core storage, then a conversion to core storage will take place. Fusion drives require the use of core storage. Yosemite can only be installed ...


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I've seen exactly the same problem, and solved it with iDefrag, the partitioning tool needs contiguous space, not just space. The only other option is to wipe the drive. There are other defrag tools but they're not as good. I think iDefrag is the best available option (assuming you're using a standard HDD, don't defrag solid state drives)


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Click on the "Time Machine" drive that is indented (the one underneath the one you selected on your screen). Then the "Erase" tab should appear. Also, if your Time Machine is encrypted, my experience was that I needed to erase it and choose an unencrypted format in order to really regain full control of the disk.


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To remove all entries from the GPT and MBR tables, open the Disk Utility application and do the following. Select your disk. Select Partition tab. Set Partition Layout to "1 Partition". Set Format to "Free Space". Click on the Option... button and select "Master Boot Record". Click Ok to close the pop up window. Click the Apply button. The image below ...


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I had this issue with an external disk in ExFAT, nothing worked. I was just about to use recovery software but boot into Windows, Windows read it fine. Booted back into OS X and now everything is as it should be. Weird.


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I had this problem / error message, but it turned out that Disk Utility HAD actually erased free space on the drive anyway.


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OmniDiskSweeper may not be running with administrator privileges and it cannot access all folders, therefore it is not counting everything. The command du -x -sk /* in Terminal may give you a better/correct result.


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This may be a problem with Disk Utility.app and diskutil. I would recommend booting into recovery mode (CMD + R at startup) and verifying the main hard disk. If this turns up fine then a reinstall or restoring from a backup where the problem did not take place is the way to go.


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This is an example of a procedure to erase an external disk containing a single encrypted partition. Open the Disk Utility application and highlight the "Logical Volume Group" representing your external disk. An example is shown below. (Hint: click on image for a better view.) Next, click the Info icon to get the pop up window. Note, in the example shown ...


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The other option would be to boot into recovery mode (COMMAND-R at boot) go into disk utility and (if O/S X is on the HD) delete the Ubuntu partition and expand the Mac partition into that space.


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Since you got it from Craigslist, you do not know what is on it, and you do not want to know nor to have it. Get a working bootable USB with OS X on it. Format the drive that will erase all the information on it. Install OSX from the USB.


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So, after buying a new SSHD and SATA cable, spending 3 weeks reading and writing command lines on Terminal.... this is what fixed my problem, believe it or not: https://www.youtube.com/watch?v=Amg5w0rlwDo&spfreload=10 I mean, seriously Apple? The design of the SATA cable path is so prone to failure....it's obvious!


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Way by Terminal.. Use diskutil list in a Terminal instance to list all volumes and find yours. Then do hdiutil eject disk? Replace the ? with your disk number, making sure you are not trying to eject the main hard drive :) It is probably called "Disk1" Here is a Sample when I insert a USB stick and run diskutil list disk0 is my hard drive and I can ...


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You might have blown the logic board…might have. That unit uses an integrated I/O and video controller. I'd be afraid that pulling the video cable out may have produced a transient that damaged part of it. You might want to try putting one of the drives in an external case and see if it can work that way. Another possibility could be the SATA cable itself ...


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Unless I'm missing something here it shouldn't be much more complicated than booting into your recovery partition (assuming it's working correctly), reinstalling OS X and then restoring your data from the TM backup on your WD drive when prompted at the end of the OS X installation process. If you have issues with the recovery partition go for Internet ...


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There is no erase tab when using a disk that was a Time Machine.


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The problem was VirtualBox. Specifically, the Windows 7 VM instance I had running was "grabbing" the device for itself. So, it unmounted it from OS X and passed the USB port to the VM. It was doing it automatically so I couldn't see anything. To fix, you uncheck the device next to the USB filter. The filter automatically connects a USB device to the ...


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Another solution is also posted here. It works with standard (build-in) OS X system tools. Depending on your partition table and the CoreStorage listing some slight adjustments may be necessary.


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I created a bootable usb with unetbootin and Gparted. I booted the mac with the stick. i moved my Recovery HD to the end. Then I rebooted normally, opened up Disk Utility, dragged the end of the main partition to the bottom.


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If you have a backup, format the Mac's drive, taking care to protect the backup. If you don't have a backup, try some tools like DiskWarrior or TechTool on the Mac's drive. If those don't help, you'll probably have to format and lose your data. If you can't format the drive, it will need to be replaced.


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There is some "corruption" on some of your files. Since you already ran the Disk Utility and it came back clean it is telling you that there are no physical errors with your drive. That's the good part. You have a couple of options: Run fsck Do a clean install Running fsck. You will need to do so in single user mode (hold down Command-S during boot) ...


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Thank you both for your replies, they helped my investigation. (David Anderson and Wes Sayweed) There are many reports of both W7 and W8 running bootable from an external drive. I hoped that with the proper disk setup, activation, and EFI settings I could accomplish this, but I have discovered the barrier: you need a usb3 or thunderbolt connection, it ...


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I'm assuming that the port in your macbook air has been confirmed to be in working condition. Another consideration is that the hard drive's port has been damaged. Are you able (perhaps through a friend) to test the hard drive functionality on another mac or windows system? Even if you had to reformat on a windows system, that would (hopefully) get the ...


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There is a solution to your problem: Filesystem verification can be stopped by booting to single-user mode, and then typing in order: /sbin/fsck -fy reboot Could not unmount disk is because you are probably using it. Try booting from Recovery HD. If problem persists, boot Recovery from USB or use Internet Recovery to partition disk.


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I was having exactly the same problem as described above; unable to reformat my 16GB USB after interrupting an "erase free space" command. This worked http://www.macissues.com/2014/04/05/how-to-fix-deep-formatting-problems-with-os-x-drives/ The instructions are clear & simple, no Terminal experience required. The command will force a reformat--of course ...



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