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While I do not have experience with this particular method O/S X can easily boot from multi partitions on any media. It does to matter if it is a USB key, a Thunderbolt RAID array or whatever. Holding down the option key will give you all bootable partitions available to the Mac at boot.


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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 ...


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The only viable options for RAID using just 2 drives would be RAID 0 or 1. RAID 1 wouldn't increase your storage, so 0 is the only remaining choice. Even if you could RAID an internal fixed drive to a removable SD card (& without first formatting both), the drive would only be 'whole' so long as both were present (& still functional.) If either ...


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The only correct way is indeed to use Bootcamp Assistant to free up the Windows partition space...


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I installed the Windows 10 Preview. I then booted up into OS X. I turned off FileVault, and removed my Windows partition via Boot Camp Assistant. Finally, check disk utility and you'll see the free space went to your Mac partition.


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To rename the Recovery Partition, falsely named "EFI Boot", I first mounted the Recovery HD, by showing all partitions in Disk Utility. I did this by enabling the debug menu: 1.) quit Disk Utility 2.) In Terminal write or paste defaults write com.apple.DiskUtility DUDebugMenuEnabled 1 and hit 'enter'. Launch Disk Utility and select "Show every Partition" ...


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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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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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A more advanced method. Some shell experience is required: Install VirtualBox, including command-line utilities Run Boot Camp Assistant to create the partition for Windows, but once the partitioning process is completed, quit Boot Camp Assistant and proceed to step 3 Run diskutil unmount BOOTCAMP in the terminal Run diskutil list From here you should see ...


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You'll need a third party utility that can repartition a live drive. The Apple software will not make additional partitions beyond the Bootcamp one. Or, the hard-but-effective way is to back everything up, wipe and repartition, then copy back. Winclone is a good program for backing up Boot Camp partitions. Personally, this issue was worth it to me to buy ...


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Winclone is the OS X software to backup and restore the Windows OS on a BootCamp partition. http://twocanoes.com/winclone/ It lets you escape Apple's restriction to only have two OS partitions on a drive. You still might have to delete bootcamp, but you can then restore it in working form after you've re-done the boot drive partitioning to your liking. ...


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you can try to connect you HDD to another mac. you can create full copy of this disk via dd vith noerror parameter If you use windows you cat use Ext2Read for access to linux partition.


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I am writing this so anyone else in my situation can learn from the experience in case they google it. I am not knowledgeable and have no clue about Os X, I was unable to resolve my situation in a timely manner and what I ended up doing is reinstalling both OSX and Win, it took less than 24 hrs. Don't do it if you know what you are doing but I had no other ...


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The disk giving you problems uses the GUID partition table (GPT) to define the its layout. You provided me with the relevant contents of this table when you posted the output from the command sudo gpt -r show /dev/disk0. These values appear to be correct, except for the entry with an index of 3. This entry is shown below. 480002496 1269536 3 ...


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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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Presumably you deleted the recovery partition, which is about that size. Boot into Internet Recovery, start the terminal and type diskutil list. If the OS X partition is still there, you should see it as formatted with CoreStorage (OS X doesn't require the recovery partition for a normal HFS+ formatted partition). If it exists, then the solution is to do a ...


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I can see two problems. The MBR partition table on disk 1 has the wrong values. disk1s1 does not belong and should be removed. I will show how to fix the first problem. Open the Script Editor application and open a new empty window. The preferences show I am using "Script Editor (2.7)" and "AppleScript (2.4)" as defaults. Paste the following code in ...


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According to Apple, you must use BootCamp to initialize a Windows partition or it won't work. I suggest you do the following. Get WinClone if you don't already have it. The best way to back up your BootCamp partition. http://twocanoes.com/winclone/ Use WinClone to back up your BootCamp partition. Initialize your new hard disk to Mac OS X. Use BootCamp ...


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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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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 This video shows how an electric tape can isolate the sata cable and prevent it to touch the aluminium surface, which will cause you some ...


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Here is sample one-liner which gets the version info from SystemVersion.plist: ex -s +'%s/<[^>].\{-}>//ge' +'%s/\s\+//e' +'%norm J' +'g/^$/d' +%p +q! /System/Library/CoreServices/SystemVersion.plist You may use head, tail or awk for further parsing, for example to get ProductVersion, try adding: | grep ^ProductVersion | cut -d' ' -f2 Or try to ...


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It is possible, but unadvisable, to run OS X 10.10 Mavericks on a 16 GB partition. I am doing so at the moment during a reinstall. Mac OS X prefers to have applications on the boot drive, as well as the user home locations, swapfile, and sleep image file. if you are not willing to hack files, then a 32gb partition is a minimal install partition for ...


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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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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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Usually Mac disks contain a GPT (GUID Partition Table) to define the partitions. Your GPT seems to be destroyed/lost and only the PMBR is left. Your main goal is to rebuild the GPT. Recreating your GPT doesn't affect the content of your disk - except the first and last 32 blocks of course. To reproduce your problem I've created a disk in a Yosemite-VM with ...


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A good option is to try DiskWarrior: Everything just disappeared after your Mac went haywire. All your work documents. The music you most enjoy. The movie of your kid's first steps. It's your life and it's gone. Don't panic! DiskWarrior will recover your documents, photos, music and any other files when disaster strikes and you lose access to your files. ...


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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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