GUID partition format not on menu

Trying to create a clone & need to format external drive in GUID. The rub is that GUID is not among the options in Disk Utility (OSX 10.4.8). How do I cut this Ghordian knot?

In Disk Utility an entire disk can be set to the GUID partition scheme by selecting the drive (not volume) in the list>Partition>Option (button) a drop down sheet will appear to select the scheme.
HTH
W1

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Why is my GUID partitioned HD not booting from external firewire

Hello everyone,
I have a new 2TB WD EARS drive which I have Snow Leopard installed on. It was cloned from my 1TB WD drive which was running Snow Leopard perfectly beforehand. I have the 2TB HDD installed in a firewire400/800/USB/eSata enclosure and I cannot boot up from the HDD. It is GUID Partitioned as you can see from the Info below:
    Name :     WDC WD20 EARS-19MVWB0 Media
    Type :     Disk
    Partition Map Scheme :     GUID Partition Table
    Disk Identifier :     disk1
    Media Name :     WDC WD20 EARS-19MVWB0 Media
    Media Type :     Generic
    Connection Bus :     USB
    USB Serial Number :     000001D919A8
    Writable :     Yes
    Ejectable :     Yes
    Mac OS 9 Drivers Installed :     No
    Location :     External
    Total Capacity :     1.8 TB (2,000,398,934,016 Bytes)
    S.M.A.R.T. Status :     Not Supported
    Disk Number :     1
    Partition Number :     0
Name :     CREAZNMIND
    Type :     Volume
    Disk Identifier :     disk1s2
    Mount Point :     /Volumes/CREAZNMIND
    File System :     Mac OS Extended
    Connection Bus :     USB
    Writable :     Yes
    Universal Unique Identifier :     22415261-328A-3D43-80BC-241D1051E78C
    Capacity :     1.8 TB (2,000,054,956,032 Bytes)
    Free Space :     1.3 TB (1,393,188,286,464 Bytes)
    Used :     565.2 GB (606,866,669,568 Bytes)
    Number of Files :     851,286
    Number of Folders :     186,288
    Owners Enabled :     No
    Can Turn Owners Off :     Yes
    Can Be Formatted :     Yes
    Bootable :     Yes
    Supports Journaling :     Yes
    Journaled :     No
    Disk Number :     1
    Partition Number :     2
I am unable to boot in both firewire 400/800 and USB. What is confusing is that if another drive with a partition format for windows is installed the drive is recognized without a problem and mounts. I can see the HDD in Disk Utility but only the Disk itself is selectable but the partition is greyed out. The drive also cannot be checked or repaired in Disk Utility when connected with the firewire enclosure. I have tried this on two seperate apple computers, one even being an older PPC. Another thing that confuses me is that if I attached the HD to the computer using only a SATA/USB adapter cable, I can boot off the drive just fine. And when connected to a PPC the drive mounts seemlessly. I went into the shop where I purchased my enclosure and after some testing they said that it was because of the GPT Protection which is just GUI Partition Table. They said this is a somewhat common problem with Firewire enclosures and even LaCie reported this problem. Has anyone ever heard of this? Is there a problem between GUID and Firewire interfaces? If Intel Macs can only use GUID partitioning how can I get around this problem? I've looked around and it seems it's possible to install SL onto an APM drive by cloning from an Intel system, but why won't it just work the way it's supposed to? Any insights would be helpful....
Thanks in advance!

Journaled isn't a requirement for SL to boot. All I can suggest for the OP is to erase and repartition the HD; then, try again.

I want to install OS X Mavericks on my MacBook Pro which is not with guid partition table

i want to install OS X Mavericks on my MacBook Pro which had both mountain lion & windows 8.1, its not in GUID partition table format, so i couldnt install mavericks, so is there any way to change into GUID partition table format & install Mavericks without losing Windows from my hard disk ?

Open the App Store and upgrade iPhoto to the Mavericks version.
iWork and iLife for Mac come free with every new Mac purchase. Existing users running Mavericks can update their apps for free from the Mac App Store℠. iWork and iLife for iOS are available for free from the App Store℠ for any new device running iOS 7, and are also available as free updates for existing users. GarageBand for Mac and iOS are free for all OS X Mavericks and iOS 7 users. Additional GarageBand instruments and sounds are available for a one-time in-app purchase of $4.99 for each platform.
The iWork apps are free with a new iOS device since 1 SEP 2013. They are free with a new Mac since 1 OCT 2013. They are also free with the upgrade to OS X Mavericks 10.9 if you had the previous version installed when you upgraded.

I'm trying to install OS 10.6 onto my Macbook, which currently has OS 10.5.8. I clicked install (on the DVD) and selected my Macintosh HD drive. I was given the message that that disk cannot be used because it does not have the GUID partition????

I'm trying to install OS 10.6 onto my Macbook, which currently has OS 10.5.8. I clicked install (on the DVD) and selected my Macintosh HD drive. I was given the message that that disk cannot be used because it does not have the GUID partition. In order to have a GUID partition, it suggested I go to disk utility and make the change. I couldn't see the partition tabs in the disk utility application. So how do I accomplish the GUID partition?

The problem is, reformatting the partition may require you erase the hard drive. Normally Intel Macs are preformatted GUID. The fact that yours is not, says someone who initially installed the system on your Mac did you a disservice. Regardless, you should backup your data before you upgrade. GUID formatted drives generally are not compatible with iBooks (pre-2006 consumer notebooks by Apple) Powerbooks, and PowerMacs, and iMac G5s. So if you indeed have machine with the MacBook name on the screen frame, it was not properly formatted from the beginning.

I've bought Mountain Lion but my iMac's HD isn't the correct format (Mac OS Extended(Journaled) instead of GUID partition what do I do?

Can I just back up to Time machine, then reformat disk then re down load?

As mende1 stated, the two are different and must be both.
If you open Disk Utility and select the hard drive (the type, size, and serial number), not the volume (Macintosh HD), it will tell you at the bottom of the screen what the Partition Table is. It should be GUID. If not, then you will need to back it up, then repartition the drive. Also, copy the Mountain Lion installer onto another drive so you don't have to download again. It is in the Applications folder.
There are a few methods to get back where you are, including wipe, install old OS, restore from TM, install ML.
You might search the web for a tutorial on creating a boot/install disk using the Mountain Lion installer.
Another easy way is to use something like Carbon Copy Cloner or SuperDuper to clone your current OS onto another drive. Then, boot using the external you cloned. Use Disk Utility to re-partition the internal drive as noted below, then Clone your current OS back to the internal. Then, use the installer you tucked away to reinstall.
If running Snow Leopard, you need to boot using your install disk, then open Disk Utility.
If running Lion, you need to boot into the Recovery HD by holding down cmd-r on restart.
From there, open Disk Utility, select the hard drive, then the Partition tab.
Select 1 partition from the partition layout dropdown (or however you'd like, just don't use current).
Set the Name of the disk. Macintosh HD is the norm, but you can name it anything you want.
Set the Format to Mac OS Extended (Journaled)
Click the Options Button.
Set the Partition Table to GUID Partition Table.
Back on the partition tab, click Apply.

Can't format SSD to GUID Partition Scheme

I can't format my SSD to GUID Partition Scheme with Mac OS Extended(Journaled) but Master Boot works fine. When i try, it stucks even i tried Recovery HD. You can see issue in picture. What should i do?
MBP Mid 2012 OS X Yosemite 10.10.2
SSD is Samsung SSD 840 EVO

c_arslan wrote:
Toshiba is the current boot drive. I can't use the SSD because of the format of it. So there is SSD inside without format, filesystem etc.
In that case, since the SSD likely came with an MBR Partition Map, at the beginning of your format process, did you choose the Partition button, pull down the drop-down menu under Partition Layout, and choose 1 Partition, and then, using the Options button at the bottom, select GUID?

Install mountain lion on a not GUID partition

I try to install osx mountain lion but i can't because it should be installed on a GUID partition. Mine is not as it should be, how could I format with GUID option if I have only one partition? Disk tool doesn't let me make other partition, how could I do?

You cannot install Mountain Lion on a partition other than GUID; an Intel-based Mac needs a GUID disk to boot. Is this disk you're trying to install to the one your computer is booted from now? If so, what model of Mac do you have and what version of Mac OS X? Only if your computer is a PowerPC-based system would it be able to boot from a non-GUID volume, and you can't run Mountain Lion on a PowerPC system, so I'm rather puzzled about your situation. Please provide more details.
Regards.

FAT32 Partitions on GUID Partition Table External Drive Not Seen in Vista

I have an interesting predicament. I have repartitioned my external hard drive to have 5 partitions: 2 HFS+ and 3 FAT32. The external drive has a GUID Partition Table. The drive was formatted and partitioned using Disk Utility.
When I boot into Windows Vista using Boot Camp, Vista will ONLY mount the first Windows compatible partition. For example, if I have two partitions disk2s2 and disk2s3 (both FAT32), Vista only mounts disk2s2.
The described partition setup worked well with Master Boot Record, minus the bug with Time Machine choking every so often.
Any ideas on how I can get Vista to recognize these partitions?

Hi Karl87,
according to the german computer magazine c't there is a limitation/flaw in the Master Boot Record (MBR:
Only the first four partitions are shown in the MBR and since one of these entrys is taken by the needed hidden EFI-partition and the next two entrys are taken by the OSX partition, there is only one of your three FAT partitions shown.
This limitation to four partition entries is quite old.
See here for further informations: http://en.wikipedia.org/wiki/Masterbootrecord
To my knowledge there is no solution for this.
Regards
Stefan

Can't install windows it says the boot camp partition is not formatted as a NTFS file structure

Using boot camp assistant it gets to the point of installing windows 7 and it won't because the boot camp partition is not a NTFS file structure. It also seems strange to me that there are 5 partitions would have expect ether 2 or 3. Please help this is very frustrating.
Thanks in advance

Open, if not so already, the Windows formatter. Identify the BC Windows partition. It will be the one listed with the proper size you created and/or will be labeled as a C: drive. Be careful you select the right one or you may be corrupting the entire drive.
Format the partition as NTFS.

HT5225 "This disc does not use the GUID Partition Table Scheme...". I keep getting this message when I try to install OSXLion. It has something to do with a repair Apple performed last year. I use a 17" MacBookPro. Any suggestions?

"This disc does not use the GUID Partition Table Scheme. Use Disc Utility to change the partition scheme". I keep getting this message when I try to install OSX Lion so that I can upgrade my 17" MacBookPro to move to iCloud. My harddrive was replaced last year by Apple because of a fault by the manufacturer and I think this is the cause of the problem. What can I do so that I don't lose my content.

When you click the partion tab. There is option on the bottom of the window. Click on that there there are these options.

Hi, trying to install win7 over bootcamp and the partition is not accepted although its formatted ntfs

trying to install win7 over bootcamp with usb flash drive, the partition is not accepted under windows although its formatted ntfs, there is shown a faillure which could be read in the logs of win install but i don't find them

You'll probably have better responses over in the Boot Camp forum....here's a link for you:
https://discussions.apple.com/community/windows_software/boot_camp

HT2434 does anybody know what happens if I dont update the firmware of my macbook pro (does not have a guid partition scheme))

does anybody know what happens if I dont update the firmware of my macbook pro (does not have a guid partition scheme)?

Apple will hire a high school girls clique to follow you around, make fun of you & post disparaging comments on Facebook .

Ok to format SYSTEM partition if not booting from original drive anymore?

I bought a SSD for my HP Pavilion dv7 and installed it as the primary boot drive, upgrading with a new copy of Windows at the same time. I use the original drive in the second slot for data, and have formatted the original C: partition, but not touched the other 3 partitions. I would like to be able to use at least one primary partition for another OS or as a backup partition. If I want to leave the recovery partition alone, and be able to run diagnostics, that means SYSTEM....Can the recovery tools work if they are not on the boot drive? If so, I can take the SYSTEM partition (the SSD has the active boot partition).
This question was solved.
View Solution.

Hi,
Unless the Bios can access the HP_TOOLS partition at boot ( which it will not be able to from the drive in the second bay ), you will lose the ability to run the extended diagnostics and the ability to have the bios flash execute on reboot. The bios will still be able to be updated, but the flash will run in the Windows environment which has more potential to cause problems.
However, the HP_TOOLS partition can be created on a flash drive or you could simply create it on your SSD - see the document on the link below regarding this - this is just as an example and the download included may not be correct for your particular notebook, so you would need to get this from your own Product page.
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-101396-1&cc=uk&dlc=en&lc=en...
Regards,
DP-K
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Microsoft MVP - Windows Experience

"GUID partition table scheme" Can't install snow leopard on my mbp.

I have a mbp that is partitioned as half mac, half XP. I put in the snow leopard CD and came up with an error that said I could not istall snow leopard because my partition did not fit the "GUID partition table scheme". I followed the menues to the partition section of the disk utility. From there, I don't know what to do. I can't click on the "options" button to change to the GUILD thing. Do I need to repartition my entire mbp? Will this erase my other partition? And will it delete all my data? Any suggestions on what to do???

GUID partition table (GPT) or map is a set of instructions at the very begining of a storage drive to tell the hardware what partitions and formats are where on the drive.
A Intel Mac now requires a GPT to boot OS X as it uses EFI (Extensible Firmware Interface) which is a software firmware in a hidden EFI partition on the boot drive designed originally for copy protection by Intel. EFI loads into memory before OS X does, which can be seen if you have verbose mode activated upon boot time.
Setting up the boot drive with a GUID Partiton table WILL require backing up of all data off the machine and a complete erasure of ALL partitions on the drive, which includes ALL data, programs, operating systems and files not backed up off the machine previously.
Since a partition map is basically road directions, when it's destroyed so does go the partitions.
Also since you will be fresh installing 10.6, your free iLife won't tag along,, however you can erase/install 10.5 first then upgrade to 10.6 (no BootCamp) and that shoudl work.
Unfortunatly Mac's only now support Windows 7 in Bootcamp, however Windows 7 Pro (and above) will run XP programs natively or via free virtual machine XP downloaded from Microsoft, however since it's really not native, 3D games etc likely won't run very well.
If your not familiar or willing to take a chance, then I suggest you have someone else upgrade that machine.
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

How to partition/format external drive?

Hi,
I bought a WD MyBook 320 GB external drive. It is by default formatted in fat32. However, fat32 has a ridiculous file size limitation! (<4GB)
I have 2 Macs, one windows and one linux boxes at home, one linux and one windows boxes at work. I want that all the machines has access to it. But maybe I can forget windows box. I need some advice, which one is better:
1. Format it as HFS+, forget windows, maybe I can use hfsutils for windows, and maybe I can access to it by this (is there anybody using hfsutils???)
2. Format 120 GB in HFS+, the rest fat32. I will use HFS partition just for full image of my mac's harddisks, and fat32 will be accessible to every computer.
Any suggestions?
Thanks...

You cannot format the drive with both Mac OS Extended and FAT32 partitions. If you need FAT32 you must format the entire drive FAT32. If you format the drive Mac OS Extended, then you will need software on the Window's PC that enables reading/writing Mac disks such as MacDrive.
To format the drive:
Extended Hard Drive Preparation
1. Open Disk Utility in the Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing (this does not apply to external drives.) Otherwise, click on the Partition tab in the DU main window.
3. Click on the Options button and select the GUID partition scheme then click on OK. Set the number of partitions from the dropdown menu (use 1 partition unless you wish to make more.) Set the format type to Mac OS Extended (Journaled, if supported.) Click on the Partition button and wait until the volume(s) mount on the Desktop.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled, if supported.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process will take 30 minutes to an hour or more depending upon the drive size.
If you prefer to format the entire drive as FAT32, then in Step 3 select the MBR partition scheme instead of GUID.
If you plan to use the external drive to backup your main hard drive then do that by cloning the main drive:
How to Clone Using Restore Option of Disk Utility
1. Select the destination drive on the Desktop and press COMMAND-I to open the Get Info window. At the bottom in the Ownership and Permissions section be sure the box labeled "Ignore Permissions on this Volume" is unchecked. Set Ownership and Permissions as follows: Owner=system with read/write; Group=admin with read/write; Other with read-only.
2. Open Disk Utility from the Utilities folder.
3. Select the backup or destination volume from the left side list.
4. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button.
5. Click on the Restore tab in the DU main window.
6. Select the backup or destination volume from the left side list and drag it to the Destination entry field.
7. Select the startup or source volume from the left side list and drag it to the Source entry field.
8. Double-check you got it right, then click on the Restore button.
For added precaution you can boot into safe mode before doing the clone.

GUID partition format not on menu

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