OS X V10.7 Lion :: Change From Master Boot Record To GUID Scheme?
Jun 6, 2012
I've downloaded Lion and the first "complaint" the installation software has is that neither my Mac hard drive nor Time Machine drive uses the GUID partition scheme. The software instructs me to use Disk Utility to select the appropriate format but Disk Utility states that I can't re-size the partition because it uses the Master Boot Record scheme. Further, it tells me that the drive can't be erased because it's the start-up disk.
I have Snow Leopard 10.6.8 installed on my MacBook (Core 2 Duo, 4 GB). The Mac HD has 220GB available.I waited for Lion to be reasonably fault-free and carefully looked at Lion's requirements only to find out too late about this GUID scheme business. I haven't seen anything about this requirement until I tried to install. I have great fear of re-formatting the drive as that always seems to be the beginning of many problems that take months to resolve. Maybe the choices are to forget Lion or get a new drive and format it to GUID before restoring from my Time Machine
Info:MacBook, Mac OS X (10.6.8)
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Mar 1, 2010
I want to delete a partition and create a new one, but I need to be able to click option in able to do this. For whatever reason, disk utility will not let me edit my external in any way without deleting the whole thing which I do not want to do.
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Mar 18, 2009
I am looking for a used Mac for my folks, and someone has posted an imac that they have converted to a PC, having change the master boot record. They say I have to take it to the apple store to get it changed back, but couldn't I just start it up in target disk mode, and reformat the internal drive use carbon copy cloner or something like that?
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Jan 30, 2010
Ok here's the situation. I'm trying to fix my brothers laptop at the moment and reinstall Leopard. He installed ubuntu and it seems to have deleted the Master Boot record. I've managed to get Leopard to install but the mouse clicker doesn't work. I've managed to narrow down the problem to the MBR, the master boot record.
In terminal I've typed in sudo fdisk -u /dev/rdisk0
This has come up with the error "master boot record not found". I'm now trying to find a way to put the Master boot record back.
Does anyone have any suggestions on how to do this?
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Aug 29, 2009
So much for upgrading... Does anyone have a fix for not having a GUID partition table scheme? I was hoping I wouldn't have clean install, I just got everything how I wanted it. *sigh*
Something tells me there's no way around this.
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Aug 29, 2009
I can't install Snow Leopard because my hard drive doesn't have a Guid partition scheme. how do i reformat my drive without losing all my info.
P.s. I'm backing up my hard drive now to and external drive with carbon copy cloner.
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Aug 12, 2009
Ok here's the situation. I'm trying to fix my brothers laptop at the moment and reinstall Leopard. He installed ubuntu and it seems to have deleted the Master Boot record. I've managed to get Leopard to install but the mouse clicker doesn't work. I've managed to narrow down the problem to the MBR, the master boot record.
In terminal I've typed in sudo fdisk -u /dev/rdisk0 This has come up with the error "master boot record not found". I'm now trying to find a way to put the Master boot record back.
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Oct 25, 2010
I am having problems. I want to delete a partition and create a new one, but I need to be able to click option in able to do this. For whatever reason, disk utility will not let me edit my external in any way without deleting the whole thing which I do not want to do.
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Aug 28, 2009
I am looking for a used Mac for my folks, and someone has posted an imac that they have converted to a PC, having change the master boot record. They say I have to take it to the apple store to get it changed back, but couldn't I just start it up in target disk mode, and reformat the internal drive use carbon copy cloner or something like that?
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Feb 27, 2012
I've been going on two weeks now without my 13-inch mid-2009 mbp...i installed the 10.7.3. lion update but after it was completed i powered down my laptop and started it up only to find a blinking folder with a question mark...the logic board was replaced in mid-2010...i'm able to boot of an external drive running lion 10.7.3...i replaced the wd hdd with a new one & now it doesn't recognize it in disk utilities...i've replaced the ram with new ram & changed the hdd cable...i took it to apple & they said it should be either the cable or the hdd...i tested the hdd in another enclosure & it's running fine..
Info:
MacBook Pro (13-inch Mid 2009), Mac OS X (10.7.3)
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Oct 4, 2009
I am trying to install the Snow Leopard upgrade on my MacBook (Mac OS 10.5 Leopard), and I can't seem to do it because it tells me to change my partition scheme table to GUID. I went into disk utilities and clicked on the "partition" tab, but I can't click on the "options" button. I cannot erase my hard disk either. What could be the problem?
Just in case this is important: I changed my 160GB original HD to one of those WD passport HDs. So now my internal HD is the 500GB WD passport HD.
I already backed up my HD onto an external HD using Time Machine, but I cannot erase my internal (WD) HD
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Jul 1, 2014
After updating to 10.1.2 it seems that FCPX now uses a different file naming scheme on imported AVCHD files. Â
Previously on import, it would use a file naming scheme based on date ie. '2014-06-14 10_49_47 (id).mov' etc. which is great for me as I could see exactly what date & time that clip was created at a glance in the event viewer, also when a camera on a shoot had it's time out by an hour due to an incorrect daylight saving setting, I could use easily go through the clips tweaking the time in the file name & then they would show in the correct order in FCPX.Â
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Any way to get FCPX to import using the old naming scheme - or am I now boned if I have a camera set incorrectly ...
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May 1, 2012
how do I change my icloud master password?
Info:Mac OS X (10.6.3)
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Oct 25, 2007
I have a 1.8 duel G5, 3 gig of ram, and 2 internal hard drives, a 120 gig and an 80 gig. My question: does anyone know if it makes a difference (performance wise) which drive I boot from? The 80 was the original boot drive, but due to space problems, now I boot from the 120. I've run every diagnistic imaginable, including Diskwarrior. I have the identical machine at work, and that one just seems snappier. I maintain both machines the same, cocktail, MacJanitor etc. There is plenty of room on both drives. So the last thing I can think of is the master/slave thing.
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Mar 22, 2012
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Sep 9, 2008
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Apr 2, 2012
I have recently found out that my master password is not what I thought it was! I am currently running OS X 10.7 Lion and would like to reset my master password. There are two user accounts on the Mac - one being mine (administrator) and the other my sons (managed). I know both account passwords but not the master password. How can I reset it?
Info:
MacBook
Pro, Mac OS X (10.7.3)
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May 2, 2012
A few years ago I set a master password. I know the master password but would like to change it. I've read a few articles and it says to do this via System Preferences/Security/File Vault; however, when I get to File Vault, the master password info/screen/area is not there.
Info:iMac, Mac OS X (10.3.x)
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Mar 4, 2012
After a reinstall I can´t config Open Directory Master.
[code]...
Info:Mac OS X (10.7.3)
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Apr 4, 2012
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Jun 2, 2012
At first I had forgotten my admin/master password and made numerous attempts. Then I tried to reboot my macbookpro by pressing " command S" numerous attempts, even " command r "and the "option" key but my computer will not reboot.Now I have a huge lock icon on my screen. Plus When I purchased my computer it did not come with a startup cd.
Info:
MacBook Pro
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Oct 1, 2010
Hello all, was just reading the BBC news site and came across this article about BIOS being reflaced by UEFI- was wondering if any tech savvy folk might know a little more about how it might affect mac boot times? Sounds a major leap from what I could glean
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Dec 17, 2009
I don't know how I managed to do it, but I'm running Leopard on my MBP on an Apple Partition Map. Anyhow, I got my Snow Leopard disk yesterday and it wants me to reformat to GUID and warns me that it will erase everything. Now I have to figure out how a way to backup everything, install SL on GUID and restore everything while retaining my settings, serial numbers and all that good stuff. Is this possible?
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Oct 5, 2009
for only one user on the system, the colour scheme has gone negative. Backgrounds, files, programs, etc. have all been affected. I can't find anywhere that would have this effect - it's not in system preferences or anything like. How can I fix this?
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Jan 19, 2008
Can't seem to find the GUID formatting option in Disk Utility......?
Can somebody enlighten me?
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Jan 18, 2010
I'm trying to set up a new partition scheme for all my storage. I just purchased another drive and will buy a 1 or 1.5TB drive next week. I'd like to encrypt certain partitions. Please read on...
Hopefully someone can help me. This is my current setup:
Filesystem Size Used Avail Capacity Mounted on
/dev/disk0s2 465Gi 407Gi 58Gi 88% /
devfs 113Ki 113Ki 0Bi 100% /dev
Plato is my iPod - I use 40GB for music, the rest for backing up files.
Wittgenstein is my backup. I exclude backups of ~/Music, another big DIR and ~/Movies and it has room to backup everything else.
I also have an 8GB USB stick that I've named "mnemosyne".
What I am purchasing. I am waiting for my new 500GB 7200 drive to arrive, which will replace the current 500GB main drive. I also purchased a 32GB flash drive.
What I'm getting in the near future. I'm purchasing a 1TB or 1.5TB internal drive and building an external HDD from it within the next two weeks. I'd like to split it to 500GB for backups, the rest for media storage. I'd like to encrypt my current /System dir, my ~/Documents and all preferences from my my Applications.
I've heard filevault is prone to errors. Is this true? Are there any other full disk encryption options for mac? Would dm-crypt work through macports without corrupting my filesystem? Can I use truecrypt and create an encrypted container of say (what is now) ~/Documents
Creating the partition scheme
Questions
1) Can I resize a partition once I've created it if there's physical space left on the HDD?
2) Should I leave some space without a partition? Or should I just name it something benign and use it as a "dropbox"
3) What options do I have for encryption on a mac?
4) Is filevault prone to errors? Any benchmarking tests out there?
5) Can I use dm-crypt through macports and have a FDE setup that won't fail because it's through macports and not native? In other words, I realize all encryption schemes can fail, but I'd like to minimize risk.
6) How would I have some movies on my main HDD and others on the external volume? Is that possible? Or would I need to create two partitions for that? So, say, I want to store 40GB of everything that is currently in ~/Movies on my main HDD. Just create a partition for that, and then another partition on the external volume at 210GB?
7) How do I create separate partitions in mac?
8) How do I easily mount all partitions from all hard drives?
9) Is rsync and a script my best option for encrypting backups since Timemachine has no security whatsoever for backups?
10) What filesystem should I use? (I'm only using OS X on my macbook)
11) Any sample partition map you could share with me that will help me build this properly?
12) How do I set up a link so Mac OS X will read the partitions like they are now and display over on the left side of Finder.app as they show now? I.e. a list of Desktop, $username, Applications, Documents, Movies, Music, Pictures
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May 23, 2012
recommend me some free software that will record a video of my desktop.Â
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Feb 10, 2010
I have some things I want to keep very safe. It is not pornography (i.e. kiddie porn), nor is it illegally downloaded media files.
Imagine if I had caught a local official doing something in public that was extremely bad, and I wanted to release the pictures anonymously to our local paper and did not want the police to seize my computer and prove it was me. This is not the situation, but it is the type of stuff I want to keep extremely safe.
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Mar 10, 2012
Normally, you can create a DNS record that points to the zone itself, e.g.:Â
@Â Â 10800 IN AÂ Â Â 196.197.200.201Â
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Info:
Mac mini, Mac OS X (10.7.3)
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Jul 27, 2009
I currently am on an early 08 Macbook Pro 17". 2.4ghz with 4gb of RAM.
I've recently purchased a 32gb SDHC card. Trying to create a bootable emergency drive with os installed on it.
I plugged it into my Mac via usb adapter and it mounted fine. Was formatted as Fat-32. So went to disk utility and reformatted as 1 partition, GUID, Mac Os Extended (journaled), to make it a bootable disk for the os. When doing this it appeared to complete fine, but disappeared from my desktop. No longer showing up in finder. Still mounts in disk utility though. Tried different ports, rebooting, and reformatting,, with no resolve. Reformatted it back to Master Boot Record/ Ms Dos, and it mounts again fine in Finder. Can drag data to it with no issue.
Reformatted again as GUID and again it disappeared from Finder and desktop. This is where I'm confused...In Disk Util it completes the formatting and shows Map Scheme as GUID and journaled. The odd thing is that on the left where disks are mounted it shows the indented partition as disk3s2. Even though I've renamed it when formatting. It will maintain the name formatting back to Fat32, but not with GUID. Also if I try to repair disk it fails. " Disk Utility stopped repairing �disk3s2� because the following error was encountered:
Filesystem verify or repair failed."Does not fail doing repair as Fat32.
Figured I would just try to install Os anyways and booted to install disk. When booted to Os it did list the SD card as an optional drive, but had the exclamation point listed as not being in correct format. Instructs to reformat as GUID. Went to disk util and reformatted and it disapears from select a destination.
My questions are.. am I missing something technical about these cards and formating as GUID?
Why will this mount in Finder and also in the destination screen for install if its formatted as FAT32, but wont show up in either as GUID?
Why does it show disk3s2 similar to windows partitions, even though it was formatted as GUID and renamed?
Not sure if I'm having an actual hardware issue with card, or have to do something to modify this to be useable. Tried this on a newer iMac with same result.
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