Building boot caches on boot helper partition failed

Have a brand new IMAC (few days old) anyone know why I get this message when trying to select the startup disk.

Sorry I don't know however you do have 90 days of free AppleCare telephone support. This sounds like the perfect time to begin using it.

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Error "Building boot caches on boot helper partition failed" when installing Yosemite

I Have a MacBook Pro 8,3 17" and have been running OSX Maverick 10.9.5 quite happily. I finally decided to bite the bullet and update to OSX 10.10.1. I went through the App Store and clicked install on the Yosemite offered there.
THe install took about 55 mins and then right at the end it reported: Building boot caches on boot helper partition failed, install failed.
now i can't boot normally or restore from my time machine backup.
can anybody suggest a fix?

Install OS X Using Internet Recovery
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Internet Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
Partition and Format the hard drive:
Select Disk Utility from the main menu and click on the Continue button.
After DU loads select your newly installed hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Install button. Be sure to select the correct drive to use if you have more than one.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
This should restore the version of OS X originally pre-installed on the computer.

You can't change the startup disk to the selected disk: Building boot caches on boot helper partition failed.??

I recently installed windows 8 with boot camp and now I'm getting this error whenever I try to switch my default boot partition to mac os.. does anyone know how to fix this?

I got the same problem, only with Win 7, but after a day's search on the net I found a solution. Something very simple and easy to use.
Open up Terminal and run the following command, where DISK NAME is the name of the disk you want to boot in. PS. use the quotes (") if you disk's name is longer than 2 words.
sudo bless -mount /Volumes/"DISK NAME" -setBoot
THIS WORKED FOR ME!!

Erzeugen von Boot-Caches auf der Boot-Helper-Partition ist fehlgeschlagen.

Ich bekomme neuerdings - nach Installation einer Sonnet SSD Pro mit 2 SSD's folgende Fehlermeldung bei der Auswahl des Startlaufwerks:
Sie können dieses Volume nicht als Startvolume festlegen. Erzeugen von Boot-Caches auf der Boot-Helper-Partition ist fehlgeschlagen.
Starten funktioniert auch nur nach hochstarten mit gedrückter option-Taste und manueller Auswahl des Startlaufwerks ... Hilfe ...

Do you have both W7 and W8 on the iMac? If not, depending on your specific Mac model/year, the correct Bootcamp drivers can be downloaded and installed in W8/Bootcamp.
You can download the appropriate drivers by using Bootcamp Assistant and put them on a USB drive.

Boot Camp Partition Failed

So I tried to partition my hard drive and I got the following error message:
+Verification failed. This disk could not be partitioned.+
+Use Disk Utility to repair this disk.+
And so I continue on to Disk Utility and I try to verify the disk and I get the following error message:
+Invalid volume file count:+
+(It should be 679211 instead of 679214)+
+Invalid volume directory count:+
+(It should be 170328 instead of 170325)+
+The volume Macintosh HD needs to be repaired.+
+Error: Filesystem verify or repair failed.+
At the top of Disk Utility it says if repair disk is unavailable, boot from Mac OS X cd and use disk utility from there and repair. But when I do that I get the following error message:
+The disk "Macintosh HD" could not be unmounted.+
I used to have my HD partitioned with Windows XP installed on it, but when I tried to use parallels as well, the partition got messed up and so I deleted it. I am trying to reinstall windows but to no avail. I know it is a long read, but please help me out! Thanks!
Message was edited by: dopey080

If you removed the Windows BootCamp partition thru BootCamp Assistant, it should have been fine.
At this point, your only real option is to update your backup drive, then boot from a USB drive or DVD, and reformat the internal drive back to one partition.
Paragon sells Drive Backup 9 Pro that works with GPT and BootCamp and can facilitate moving Windows to/from a VM (like Parallels) as well as backup for Windows and partitioning tools.
Apple Disk Utility First Aid is a "start" but you often find it comes up short and you need more robust tool like Alsoft Disk Warrior.
I would never be without bootable backups, along with TimeMachine as secondary backup. But Disk Utility can restore a drive to/from USB/FireWire drives, or there is SuperDuper, or Carbon Copy Cloner to get you there.

Boot Camp Partition Failed Now Storage Says 300GB Used as "Other!"

I have a Mac Book Pro 13" Mid 2011
I used a Windows 7 disk to install windows via boot camp, I start to make a partition. I left for about 10 minutes and the computer was restarting, so I go into disk utility to check if there was the "bootcamp" partition and there wasn't. I went into about > storage and under "other" it says 365GB used. I remember before doing the whole windows thing I had way more than 95GB left. (I split the GB to 250GB mac and 350GB windows) Please help me!

Last login: Wed Jan 22 16:15:53 on ttys000
Matthews-MacBook-Pro:~ matthewbobmontespants$ sudo gpt -r -vv show disk0
gpt show: disk0: mediasize=500107862016; sectorsize=512; blocks=976773168
gpt show: disk0: PMBR at sector 0
gpt show: disk0: Pri GPT at sector 1
gpt show: disk0: Sec GPT at sector 976773167
      start       size index contents
          0          1         PMBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6
         40     409600      1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640 975093952      2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
975503592    1269536      3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
976773128          7
976773135         32         Sec GPT table
976773167          1         Sec GPT header
Matthews-MacBook-Pro:~ matthewbobmontespants$

After using VMware once, boot camp partition fails to start up

Start up repair also failed.
I just installed Windows 7 64-bit onto my brand new macbook pro using boot camp. Everything went fine, I installed the drivers and everything worked perfectly.
I then installed a couple games (Maplestory and L4D)
Neither of them worked.
I went back to Leopard and started up VMware Fusion just to mess around with Windows. Actually, all I did was re-install L4D. L4D started and worked. Surprised, I tried maplestory. It worked as well. Then I curiously restarted in windows. BSOD. Failed to start. Repair failed.
Someone shed some light?
EDIT: After restarting a couple more times Windows started. Neither of my games work though, only in VMware. Anyone know why?
Message was edited by: DxRania

Actually for me it worked perfectly under Vista Ultimate x64, and yes I do actually get an error it's error -2147467259 (unspecified error)
Compatibility mode does not work as the new "Hack Shield" prevents this....it thinks I wanna hack the game and just says maplestory will not start in compatibility mode.
Thanks for your reply by the way
EDIT: Forgot to say, all the drivers work fine. What bugs me though is that it works in VMware..
Message was edited by: DxRania
Message was edited by: DxRania

Help with boot camp partition on leopard!

So I wanted to increase my partition disc size, because I ran out of space. So I restored it and started the whole process over again, using like 75 out of the 102 gigs of free space. This time, something went wrong. I window came up and said:
"The disk cannot be partitioned because some files cannot be moved. Back up the disk and use the disk utility to format it as a single Mac OS Extended(journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again."
All I want to do is repartition it... I need help plz, thanks. Oh and I assumed the big files were obstacles so I deleted some 1-6 gig stuff I used to use not anymore(not any system stuff either) but that didn't work. Help!

I bought a new MacBook today with Leopard. I tried to install Windows XP (with service pack 2). I chose 32GB for windows. When I clicked start installation the screen went white, the windows CD was ejected and nothing else happened.
I had to switch it off manually and then I tried to restart the MacBook. The screen was just black.
I just read this:
+This means that the Windows partition is not bootable, usually because of a formatting problem. The Boot Camp Setup Assistant creates the Boot Camp partition, but the Windows installer must format it. Boot back into Mac OS X and re run the Boot Camp Setup Assistant. Remove the partition and re create it. Then install Windows again, this time allowing Windows to format the partition. Refer to the "Boot Camp Installation & Setup Guide" PDF document for more detail on installing Boot Camp.+
I couldn't reboot it into the Mac OS X so I went back to PC World and created merry ****.
They blamed me and I blamed them and said there was a formatting problem. I left the MacBook with them and they said they would try and install windows XP for me. I collect it today.
What do I do if they can't get windows on there as I don't really understand what I read above so will need something a bit clearer....step-by-step.
Can anyone help me please?

Windows XP Setup doesn't recognize my Boot Camp partition! HELP!!!

I just got my MacBook two days ago, and as soon as I got it, the first thing I did was partition the hard drive using Boot Camp Assistant, but didn't have an XP installation disk, so just left the partitions until I got the disk. But then today I got a Windows XP Home Edition SP2 Install Disk. I followed all of the instructions in Boot Camp, and I started the setup. When I got to the menu that said to choose a partition, it only showed my Mac OS X partition and not the Boot Camp partition. The only partition there was Partition 1, file system unknown, and so I quit the setup and booted up into Mac, and deleted the partition, then made another one in Boot Camp Assistant. I then tried the setup again, and got the same exact thing. Has anybody else had this problem, and if you have, how did you resolve it? This is very annoying, and any help would be appreciated.

dcarmody wrote:
I called AppleCare and they told me that it is doing this because it is an OEM version that came with my sister's Dell. You need either a retail copy or the other type of OEM OS disk.
This is nonsense. I installed from an OEM disk yesterday. The Windows OEM & retail installation disks are barely any different.
Note that Microsoft maintain that legally, as per the EULA, you can't buy an OEM version yourself & install it, and also that the license sticker's key may only ever be used on the PC it was originally stuck to. Here in Europe they suffered a court defeat on that latter point - you certainly need a separate license key for each computer but it maybe transferrable if you uninstall from the original PC. Nevertheless, Microsoft still insist to anyone who pays them attention that this condition holds, and indeed your jurisdiction may vary.
Unfortunately, this makes it frustrating to argue with anyone who maintains that you can't use an OEM disk (but nevertheless OEM disks DO work - I have used them on multiple occasions).
Stroller

Help: Windows XP on MacBook Pro Boot Camp Partition via Target Disk Mode

Firstly, let me lay out my situation. I have an old MacBook Pro (2,2) with a broken disk drive. It was dropped in its youth and can no longer read from or write to CDs or DVDs of any kind. I have just recently bought a new MacBook Pro to replace it (6,2) and am currently trying to convert the old computer into an XP machine through Boot Camp. I'd like to be able to do so without having to buy an external disk drive.
After a clean install of OS X (10.6.3) onto the old machine, I successfully partition 85GB of space (although I previously attempted the same with a 32GB file system to no avail as well) for XP to be installed upon. Because I cannot boot my XP install disk directly from the broken disk drive, I then close Boot Camp Assistant and shut down the computer. I start it up in Target Disk Mode to be accessed from the new MacBook (6,2).
Once the old MacBook is connected, I insert my XP install disk into the new MacBook (6,2) and boot from the disk. After allowing the XP (Professional) boot to load the install files, I arrow-key down to my 85GB partition (FAT32, named standard as "BOOTCAMP") on the old MacBook (2,2)'s hard drive and select it as the partition I would like to install to. This is where I am directed to a new boot window that tells me in a series of paragraphs that the XP installer cannot reach the selected partition for what seems to be a number of reasons. What it seems to be trying to say to me is that it cannot do a remote install of XP on a Target Disk Mode-connected machine, while not "knowing" that I am trying to do so. It's a similar message to the one that Boot Camp Assistant shows when one tries to create a Boot Camp partition on a machine that is being accessed via Target Disk Mode (Apple puts it much more clearly than Microsoft).
I'd be perfectly content, albiet slightly vexed, to conclude here that it is not possible, shuttle over to the nearest Best Buy, and purchase an external disk drive if it weren't for one thing: I tried the same thing two weeks ago with Ubuntu 10.10 and it installed perfectly on the Boot Camp partition I had created then (I have since wiped all and installed OS X cleanly on the laptop).
Here comes the point/questions:
If the Ubuntu boot disk can access the partition, why can't the XP boot disk?
Is there some way to convince the boot system that the drive is local, rather than being accessed via Target Disk Mode?
Is there an easy solution that doesn't even require that, and will allow me to install to the disk over a firewire connection?
If anyone's knowledgeable and/or brave enough to tackle this one, I'll be eternally grateful. Heck, I'll be grateful if anyone even attempts to tackle it.
Thanks,
-Alec Page

Windows XP will only install from the optical drive. Target Disk Mode does not work with Windows volumes. Windows will not install from any external device.

Help-Erasing a Boot Camp Partition Caused 32 GB of Disk Space to Vanish

Hi
I'm a new mac user I'd I have been really happy so far, expect for this problem:
-I created a 32 gb partition with boot camp.
-I tried installing windows xp without knowing I had to format the system to NTFS during the install
The installation didnt work, and I erased the bootcamp partition.
-When I tried to create a new boot camp partition, it said my Mac HD size hard drive is 227 gb, ie the *32 gb allocated to the partition had vanished*. In addition, I could not recreate a partition because of an error message.
-I ran the snow leopard CD's disk utility and thought that I had fixed the problem.
-However in boot camp, the mac drive is still only 227 gb (missing 32 gb). I can create partitions now, and deleting these partitions does cause any additional loss of disk space.
-I tried erasing empty disk space with no luck.
Does anyone know how to recover space lost by Boot Camp?
Thanks

qcpharaoh wrote:
-When I tried to create a new boot camp partition, it said my Mac HD size hard drive is 227 gb, ie the *32 gb allocated to the partition had vanished*. In addition, I could not recreate a partition because of an error message.
-I ran the snow leopard CD's disk utility and thought that I had fixed the problem.
-However in boot camp, the mac drive is still only 227 gb (missing 32 gb). I can create partitions now, and deleting these partitions does cause any additional loss of disk space.
Let me ask a simple question. What size HD do you have in your Mac? You say you see 227 GB and that 32GB is "missing". If I add those two numbers up I com up with 259 GB. I suspect that your "missing" space is due to the inconsistencies in which Snow Leopard now reports 1 GB. In some places it reports 1 GB as a hard disk manufacturer (1 GB = 1,000,000,000 bytes). In other places it reports 1 GB as a binary number (1 GB = 2^^30 [IIRC] = 1,073,741,824 Bytes). Since I do not know of any drive manufacturer that sells a 259 GB drive, I suspect that this is just due to the differing definitions of 1 GB.

HELP- boot camp partition says it's filled to 20GB w/ just XP & 1 game demo

Hi-
I'm really confused -
My new boot camp partition was set for 30GB, which it has.
I put on Windows XP2 and it runs fine.
I've installed some various game demos and deleted all but one that occupies roughly 2GB (Call of Duty 4 Demo).
Right now the partition says it has 20 GB on it with 10 GB free.
If my game demo occupies 2GB, that means XP uses 18 GB!!!
I also had deleted some other 1 and 2 GB demos using "Remove Programs", but the Hard Disk did not gain free space.
What should I do?

Right click on your disk drive icon (in explorer for example), selecting Properties. Press Disk Cleanup tab. You can check all items shown in Files to delete, as you wish. Press More Options tab & press System Rrestore & Shadow Copies Clean up Tab. This will remove all but most recent recovery backup, and then remove files selected from previous Tab setting.

How do I make a clone of the Boot camp partition?

My MacBook Air (10.6.8) is having problems and I need to send it away for repairs. Before I do that I want to make a clone of everything and put it on my new MacBook Pro (10.7.2)
I am making a clone of the Mac partition using Carbon Copy Cloner. That has worked well as a backup for me.
The only problem is I need to make a clone of the Boot camp partition (Windows partition) and I don't know how.
I want to make an exact clone so it has all the operating system, files and everything.
The other question is when should I make a Bootcamp partition?
Should I migrate the clone to the new mac using Migration Assistant, and then make a boot camp partition? And then what are the exact steps putting the clone onto the boot camp partition?
Thanks for any help.

Here are some previous coments made on this forun regarding backup of a Boot Camp partition. I use Paragon HDMSuite 2011.
Casper 6 does seem to work;
WinClone was handy for XP users but doesn't for instance check for errors during the backup only during restore. Winclone was discontinued at 2.2, all 2.3 versions are hacks (removal of the OS check seems to be the main thing) There has been no deveoplment or support for a while now.
Acronis 2011 w/ plus pak, didn't work well previously
Ghost 15 - probably not
Casper 6 works for Windows on Boot Camp only
CopyCatX is more lengthy and sector copy so takes the longest.
Paragon Hard Drive Suite 2011 because it works great
and they have CampTune
Windows 7 system backup and restore - Apple's goofy HFS read-only interferes with system and file backup.
I have also used Casper, Clonezilla and Paragon but less regularly, Casper failed a few times, I stopped using it, Clonezilla worked but took forever (for me) Paragon (which I have only used twice) was the best but my sample is limited.
I have restored from DU, CCC, SuperDuper and TM, they all worked, TM was slower but not a lot, you can boot from the others, which I prefer.
HDM 2011 can do either offline or online backups, the difference is that with an offline backup, the entire partition (or disk) is unallocated. In an online backup, the backup utility is running against a partition that may be making changes to itself. When you run CCC or SD! in OS X, you're running an online backup. However, I would recommend (at least for the first backup) that you boot from the HDM recovery CD to do an offline backup. This will ensure that you have an *exact* copy of the parition/disk.
Since this is you first time backing up your partition, I would suggest using one of the Backup Wizards. They'll guide you through the backup process and keep you from doing something wrong Similarly, use the Restore Wizard to restore your partition/drive.
HDMS 2011- back up a dual-boot Mac to an external USB drive, do:
1) Boot from the Recovery Disk (I'm assuming that the backup hard drive is attached before you reboot)
2) Select Paragon Hard Disk Manager
3) Launch the Backup Wizard by selecting Wizards > Backup Wizard
4) Select the Mac hard disk (not the partition) where it asks "what to backup"
5) On the Backup Destination page, select "Save data to any local drive or a network share"
6) Hit the radio button for the "Save to local drive option" (unless you got a boatload of DVD's )
7) Select the external USB drive as the backup destination
8) Look over and correct the name and comments
9) Hit Next to start the backup
When it's done, you have an entire copy of your Mac's HD saved to external media.
If you need to recover your HD, just run the Recovery Wizard and reverse the process.

How can I get my Boot Camp partition off my old drive?

I swapped out the stock 160gb drive that came in my MacBook Pro since it was acting up. I installed a new drive and restored it with Time Machine, but now my Boot Camp partition is still on my old drive. I slipped my old drive into a usb sata enclosure and tried booting from it in hope I could back it up with Winclone. When I went into the startup disk selector the drive would not show up (but it sounded like it was trying to spin up). Earlier when I pulled the drive out of my MacBook Pro it was still functioning fine, so I do not think the drive has failed.
Any ideas on how I can get the Boot Camp partition off the old drive? Thanks for your help.
-Ryan

Some drives require more current to spin-up from a "cold start" than most USB ports put out, even if the port supplies. Additionally, if the drive is failing, it may require even more power for the startup.
I have a couple USB enclosures with external AC power that I keep around in case I run into drives like this. Failing that, I also have a couple of USB cables which use 2 ports to provide additional current. Also the cable length, and gauge makes a difference.

Activate Windows 7 in Boot Camp partition on iMac 27

Hy,
I have a problem with Windows activation.
My configuration:
iMac 27.4 GB Memory, dual processor, OS X Snow leopard, Windows 7 in a Boot Camp partition
I use Windows 7 in 2 ways:
by starting the machine in the Boot Camp partition (with 4 GB memory)
by opening a session VMWARE Fusion under Mac OS X (with 1 GB memory)
No problem (except: very slow with starting and black screen - problem discussed in the same forum)
My problem: how to activate Windows?
I activated Windows after starting via Boot Camp: no problem
But when I use Windows via VMWARE Fusion, I receive a message “you must activate this version of Windows 7 - there remain xx days” I understand that the hardware configuration is not the same one, but I use Windows 7 out of only one machine (but with 2 different hardware configuration), therefore nothing illegal.
How can I solve this problem?
Has somebody the same problem ?
Thank you in advance.

hart40 wrote:
Did this actually work? My understanding is that Windows 7 regards this as two separate installations and that it won't work?
I'm trying to find out if I have to chose between bootcamp or Fusion or if I can work with both.
You need to activate Windows 7 in BootCamp and in Fusion. Microsoft allows multiple free activations. If these are the only two activations for your copy of Windows, just follow the online activation process. It is quick and simple. If this process fails for some reason, call the automatic activation line. You'll be stepped through the activation by an automated attendant (robot). In the very unlikely event that the automated call activation fails, call and talk to a Microsoft activation person who will help you out.

Building boot caches on boot helper partition failed

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