This disk doesn't use the GUID Partition table scheme.

When I Install the Lion. It is stuck.
Lion This disk doesn’t use the GUID Partition table scheme.Use disk Utility to change the partition scheme.Select the disk,choose the Partition tab,select the Volume Scheme and then click Options.
The last step has problem.
I can not click Options.

In order to repartition the startup drive you will have to boot from your Snow Leopard DVD, select Utilities and then Disk Utility. YOU MUST ERASE YOUR DISK TO CHANGE THE PARTITION TABLE. The good news is that I see you have a Time Machine backup. Make sure that your backup is current before you erase your startup disk.
Even before doing this, save a copy of the Lion installer (it is in the Applications folder) onto an external device. Your external hard drive is a good spot; it won't interfere with your Time Machine backup. This will prevent you from having to download the installer again.
The easiest way to proceed after making sure your Time Machine backup is current, saving a copy of the Lion installer, and repartitioning your startup disk, is to reinstall Snow Leopard on your newly partitioned disk. This will take a little longer but it is simple and is fully supported by Apple. Once that is done and you are running Snow Leopard on your startup disk again, run the Lion installer from whereever you saved it, and then restore your files and settings from your Time Machine backup during the install process.
There is an unsupported procedure for making a bootable Lion DVD, but it is more complex and is not supported by Apple. If you are uncomfortable with any of this and have access to an Apple Store, make an appointment at the Genius Bar and they can help you through the process.

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Lion This disk doesn't use the GUID partition table scheme

Hi I have downloaded and began running the installation but it says "This disk doesn't use the GUID partition table scheme", any ideas?! Running latest version of OSX 10.6.8
Thanks in advance!

ok, sorry if I offended you for wrong.
I did not knew Apple ships MBR partitioned disks or has official support for doing so. I always see Windows-PCs with that scheme ( Linux supports mbr and guid just like osx ) .
Of course I know that Disk Utility offers three options : GUID or MBR or Apple partition map for ppc devices.
Lion needs GUID, so a reformat is absolutely necessary for those that have one of the others.
Again sorry.

After i bought mac os x lion from web then download , after that to install but when they ask me to choose disk to install i can not choose, it say this disk does not use the GUID partiton table scheme. use disk utility to change the partition scheme. but

after i bought mac os x lion from web then download , after that to install but when they ask me to choose disk to install i can not choose, it say this disk does not use the GUID partiton table scheme. use disk utility to change the partition scheme. but

after i bought mac os x lion from web then download , after that to install but when they ask me to choose disk to install i can not choose, it say this disk does not use the GUID partiton table scheme. use disk utility to change the partition scheme. but

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.

Help Can't Install Maverick "disk doesn't use the GUID Partition-"

I have an imac and i'm using bootcamp fro windows 8. so I have Macintosh HD and BOOTCAMP Partitions. both partition have Master Boot Record as the Partition Scheme. When trying to install OS X Mavericks it rell me that "This disk doesn't use the GUID Partition Table scheme. ..." it tells me to use Disk Utility to select the disk ->partition -> select Volume Scheme and then Options... but option is grayed out... I can not change it and so can not install Mavericks... how do I solve the this issue without losing any data in mac and in windows? without deleting partitions if possible?
thanks

GUID is a drive map layout. You can only change it by opening Disk Utility, highlighting the physical drive and choosing the Partition tab. Then change the partition layout to anything other than Current. The Options button below that will then be active and you can then finally change the drive map from whatever it is now to GUID.
Note that since you must repartition the drive, you WILL lose everything on all partitions. So you MUST back up everything FIRST to another drive. This can be a clone to another physical drive, internal or external. When you clone it back after repartitioning, the drive map does not change.
To check your current drive layout, open Disk Utility and click on the physical drive you want to install Mavericks on. Example:
Then look at the lower right of Disk Utility's box. If you see anything other than GUID Partition Table, as shown below, then you must repartition the drive.
The other main problem is that you have to have another drive to boot to before you can change the one that needs to be repartitioned. Clone your current drive to another physical drive, not another partition on the same drive. Once the clone is complete, boot to that drive and you'll be able to repartition the drive you need to change.

How do I get my mac partition to use GUID partition Table Scheme?

I just bought the upgrade for Mountain Lion on my Macbook pro (Mac OS X 10.6.8). I went to install it and i had partitioned my internal harddrive with bootcamp to run windows 7. I went to select the Macintosh partition and it says that disk does not use the GUID partition Table scheme, and it will not let me select it for the upgrade. It says I have to use Disk Utility but I cant seem to figure out how to get it so I can upgrade it to mountain lion. Please help and thank you for your time
P.S. - Let me know if you need more information to get to the conclusion to this problem.

Bonjour is built-in to OS X. No download is needed.
Safari has a Bonjour browser which you can activate by opening Safari Preferences, selecting Advanced and enabling one of the Bonjour entries to add a Bookmark. If you then select the Bookmark, all devices on your local network that are advertising themselves with Bonjour will be shown.
With regards to the Air not finding the printer attached via USB, you can open System Information and select USB in the left column. The top right pane will show all the USB busses on the Air and if the printer and its USB cable are working correctly, then the printer should be listed under one of the USB busses. Do you see it? If not, try another USB printer cable.

"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

No more optical drive and windows 8 issue: "Windows cannot be installed on this disk as it has an MBR partition table."

I have an Early 2011 13" MBP going strong with an SSD and original HDD installed in the optical drive. However, having had success with windows 7 on my old HDD I was planning to install Windows 8.1 (from .iso) on my SSD. However, for the past day or so it's been a nightmare.
I tried the official procedure but by editing the bootcamp info.plist so I could boot from USB (you can't install windows from an external optical drive apparently) partitioning as bootcamp wanted too.
I then tried it a number of different ways using disk utility etc and with an empty space
However, I always seem to end up with the error "“Windows cannot be installed on this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only installed on GPT disks“
I read some interesting stuff here http://www.royhochstenbach.com/installing-windows-8-1-on-a-2013-mac-pro/
He points out that
"Windows 7 and 8 in x64 support EFI. Normally if you install Windows on a Mac and use the installation DVD, it boots into regular BIOS mode, thus can be installed on an MBR partition. I tried the same, but since the Mac Pro doesn’t have an optical drive I had to use an external drive. And apparently the Mac boots external optical drives in EFI mode too. The Bootcamp wizard is aware of this, and creates a GPT partition on a non-superdrive Mac but an MBR partition on a superdrive Mac."
This means Bootcamp is essentially making the wrong type of partition?
My real question is? How do I install it windows 8? I'm really on my last legs!
I really don't want to have to open this thing up and reinsert my optical drive as its really really difficult to get out of the enclosure (would probably have to break it).
A huge thanks in advance!

Hi,
Have you tried that suggestion?
You also could use this commands to check and install again:
Inside windows installer, hit Shift+F10 to get a command prompt, then run diskpart and type List disk to displays a list of disks and information about them, such as their size, amount of available free space, whether the disk is a basic or dynamic disk,
and whether the disk uses the master boot record (MBR) or GUID partition table (GPT) partition style.
and then select the target disk. Zap the drive (with the clean command), create GPT table (new gpt), create the GPT-EFI special partitions.
Step-by-step instructions is here for reference:
HOW TO: Use the Diskpart.efi Utility to Create a GUID Partition Table Partition on a Raw Disk in Windows
http://support.microsoft.com/kb/297800?wa=wsignin1.0
Then reboot so the firmware finds those partitions and adds the disk to the EFI-native boot order (Windows installer checks this).
Karen Hu
TechNet Community Support

Guid partition table scheme

I get this message that says that but cant read the rest its says use the disk utitlity to change....
Cant read the rest. Can someone help me?

Are you trying to install Mountain Lion and get that message?
If so, it means you have to reformat your hard drive as GUID Partition Table, which will erase all of your data. So, you need to backup your hard drive before you try.
While somewhat old, this seems to be a good tutorial on reformatting and partitioning: http://www.kenstone.net/fcp_homepage/partitioning_tiger.html
Here is a more current tutorial: http://www.ehow.com/how_4779169_partition-drive-mac-os-x.html
You'll need to boot from your Snow Leopard install disk in order to reformat startup hard drive.
Once you reformat and install Snow Leopard on the drive, you can update to 10.6.8 and then install Mountain Lion. Once you reinstall, it will ask if you want to migrate from another Mac or Backup. Choose yes and connect the backup drive.

How do I change the partition scheme to use GUID partition Table.

How do I change the partition scheme to use GUID partition Table so I can get Snow Leopard to download on my 10.5 disk.
When I insert the disk it asks me to select the disk where you want to install MAC OS X.It only give me one option the 10.5.
when I click on it it says...
"10.5" can't be used because it doesn't use the GUID Partition Table scheme.
Use Disk Utility to change the partition scheme. Select the disk, choose the Partition tab, select the Volume Scheme and then click Options.
I tried to do what it says and I can not find what it is saying. This is the info about my MacBook.
Model Name: MacBook
Model Identifier: MacBook4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 800 MHz
Boot ROM Version: MB41.00C1.B00
SMC Version (system): 1.31f0
Thank you for your help!

The GUID partition option is one of three possible choices (click the "Options" button in the Partition") menu - be careful to have a full backup as changing the partition scheme will force an erasure on the disk. Take a look at this Apple support article for more complete information:
Firmware updates for Intel-based Macs require a GUID partition scheme - Apple Support
Ignore the stuff about firmware updates and just look at the changing GUID partition scheme.
Good luck - and don't forget about the full backup BEFORE making this sort of change.

FW HD Needs Repartitioning as "GUID Partition Table" to Install Leopard ?

I have the latest iMac and the latest LaCie Quadra HD which is currently split into 2 equal partitions which are formatted as Mac OS Extended (Journaled).
I want to install a bootable version of Leopard on the LaCie so I started up with the first iMac Install DVD.
The 2 partitions of the LaCie appeared with a red exclamation mark indicating they could not be used.
There was additional info stating that in order to use the LaCie it would have to be repartitioned in Disk Utility using the "GUID Partition Table".
Needless to say I aborted the installation and came here for help.
What is it all about ?

I wanted to "repair" my new iMac because the DW directory graph showed more than 30% of the items out of order!
If I wasn't used to DW I would have been worried as it sounds appalling but 2 years previous experience with a G3 iMac and a G4 eMac show that this is perfectly normal.
DW paints this frightening scenario yet Disk Utility passes the HD as perfectly OK and the actual performance experienced is fine.
On rebuilding the directories I have never noticed any improvement on what was already good performance !

GUID partition table/Apple Partition Map

Hello,
I just bought recently a Seagate FreeAgent Go for Mac and I'm planning on using it with Time Machine. My question is the following: since the Seagate is partitioned following the GUID partition table, and my mac's internal HD is partitioned according to the Apple Partition Map; would that affect in any way the backups?
Thx!

From http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/diskutil .8.html
the +APMFormat specifies that an Apple Partition Map scheme should be used. This is the traditional Apple partitioning scheme used to start up a PowerPC-based Macintosh computer, to use the disk as a non-startup disk with any Mac, or to create a multiplatform compatible startup disk+.
For more on GPT, see:
http://developer.apple.com/technotes/tn2006/tn2166.html
http://db.tidbits.com/article/8405 and
http://www.macfixit.com/article.php?story=20060721104222189

Change Apple Parition Map to GUID Partition Table?

Hi,
My external My Passport Studio hard drive is currently formatted using the Apple Partition Map. It works fine with Time Machine, but would it work better if I changed it to the GUID Partition Table?

Not necessarily. You can use either partitioning scheme. You won't have some of the features of GUID such as repartitioning on the fly, but that's probably not essential.

Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition

just bough OSX Mountain Lion, my laptop operating with v10.6.8. Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition table. 24.44gb disk available.

Verify your computer can run Mountain Lion:
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
     OS X Mountain Lion - System Requirements
       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
         3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
         4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
         5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
         6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
         7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
Open Disk Utility and verify the drive is partitioned using GUID and formatted Mac OS Extended, Journaled. If it is then do this:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Now try installing Mountain Lion.

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.

This disk doesn't use the GUID Partition table scheme.

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