Creating a new disk formatting scheme or altering an existing scheme

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21
votes
3answers
53k views

How to resolve error: “Couldn't modify partition map because file system verification failed”?

I upgraded to Lion and decided I no longer want 100 GB of my drive devoted to Boot Camp, I never boot into Windows, I just use it as a VM anyways. So I deleted the boot camp partition using disk ...
19
votes
8answers
41k views

Macbook Air + Lion + Windows 7 Boot Camp + shared partition

I would like to setup my Macbook Air's disk drive with 3 partitions - 50Gb for OSX Lion, 50Gb for Windows 7, and the remaining 150Gb for Data to share between both OSes (music, photos etc). What's ...
13
votes
2answers
5k views

Can you make OSX mount just certain partitions when you connect an external HDD?

I have an external HDD with 4 partitions. My question is the following: is there a way of telling the OS to mount just two of them (One FAT and one HFS+) when I connect the HDD? It is rather annoying ...
13
votes
2answers
6k views

Can I resize a BootCamp partition without reinstalling Windows?

Does any one know how to do this?
12
votes
3answers
4k views

Is there a safe way to move the /Users folder to a separate volume/drive?

I have an SSD on the way and will be moving my HDD to the optical bay slot in my MBP. I want to boot from the SSD and store my /Users folder on the HDD. I've seen the way that everyone suggest ...
12
votes
4answers
67k views

How to fix broken EFI partition?

I have an iMac running OSX Lion. I also installed bootcamp and Windows 7. During the install of Windows 7 I wasn't paying complete attention and deleted and formatted the EFI partition. I didn't ...
12
votes
3answers
19k views

Is it possible to install and boot Windows on a Thunderbolt drive?

I know the BIOS emulation of the EFI firmware in Macs does not support booting from FireWire or USB drives, and the EFI version of Windows doesn't seem to be compatible with Apple's EFI ...
11
votes
6answers
6k views

How can I use NTFS partitions in OS X?

My coworkers use NTFS partitions, and I can't share my data with them, as NTFS on Mac OS X is read-only. How can I read and write onto NTFS partitions?
9
votes
1answer
9k views

Can't ever remove partition?

Running Mountain Lion. I added a partition with Disk Utility and then had second thoughts about it. I'd like to remove the partition i created, MacSSD2 and hand over its space back to MacSSD. As you ...
9
votes
4answers
7k views

How can I change the title of a boot image?

I have an external Hard Drive with two bootable partitions on it. The first is an image of a Mac OS X 10.6 Install DVD, and the second is an image of a Mac OS X 10.6.3 Install DVD. When I plug the ...
8
votes
3answers
7k views

Install 2 different OS X versions on the same machine/hdd

OK, here's my situation : I am a developer needing to debug under different OS X versions I currently own 2 macs : a MacBook Pro and an iMac the iMac has Snow Leopard (10.6) on it - it came ...
8
votes
2answers
7k views

How do I resize OS X main partition when I already have other BootCamp partitions?

Short story: partition resizing using Disk Utility fails because MediaKit reports no such partition when I try to shrink it. I also tried the same while booting from the DVD, same result. Details: ...
8
votes
2answers
12k views

Bypassing Boot Camp to install Windows using a non-standard partition scheme

My new Retina MacBook Pro is on its way, giving me time to contemplate setting it up. Good thing I got started—I had no idea how difficult it was going to be to install Windows and create an auxiliary ...
7
votes
3answers
1k views

Can the contents of a partition be recovered after partition table is overwritten?

I ran a command to make my external hdd bootable knowing that it was risky considering the command itself did not allow me to specify a partition to which to write. (In hindsight, I would now call ...
7
votes
2answers
70k views

What is the 'Mac OS X Base System' disk image on my 2011 MacBook AIr?

On my 2011 MacBook Air with Mac OS X Lion, and I boot into Recovery mode via holding the command-R key during startup, if I go into Terminal and do a diskutil list, I get a list of 12(!) logical ...
7
votes
4answers
37k views

How can I resize a partition with Disk Utility?

I have 2 partitions, I reduced the size of one and want to expand the other to fill the now available space. How do I expand the Lion Partition into the empty grey space beneath Macintosh HD ...
6
votes
5answers
26k views

Unable to Resize Partitions

I have recently created a partition on my macbook air running OS X 10.9, and this was to run install another OS instance (Yes, OS X 10.10 Yosemite, but that is an aside to the query I have) on it. I ...
6
votes
3answers
8k views

How do you install and use a Linux partition on Mavericks?

As a just-for-fun type of experiment, I was wanting to install Linux on an external drive that I own and boot it up on my 2007 iMac desktop. I know there are a plethora of guides out there on how to ...
6
votes
3answers
17k views

Boot into Mac from Windows after failed Bootcamp

Don't hate on me too much for this one... I put Win8 on my Mac Mini using Bootcamp, and all was well. I switched back and forth a couple times between the two with no problems. The problem started ...
5
votes
2answers
6k views

How to Install Windows 8.1 on Haswell Mac?

I have a Haswell retina MBP, but following the installation process with Bootcamp Assistant v.5.1.1 results in an error when Windows attempts to install. Are there any guides available that walks one ...
5
votes
3answers
30k views

Missing Yosemite Recovery Partition

After doing a standard, App Store upgrade of Yosemite it seems that the recovery partition is still Mavericks-specific. Whether I hold Cmd+R or Option and select the recovery partition it takes me to ...
5
votes
2answers
840 views

Backup Mac OS partition to NTFS: are there any drawbacks?

I need to backup Mac data into our NTFS storage partition. Are there any issues/drawbacks I should consider?
5
votes
1answer
4k views

Is blessing the Ubuntu partition reversible in OS X?

I'm considering using Ubuntu as a main OS. So far, I've been using it in a dual boot setup with OS X. The dual boot worked by holding the ⌥ alt key upon boot (not rEFIt). Blessing the Ubuntu ...
5
votes
1answer
17k views

How do I format a disk partition from the command line on OS X?

How do I format a disk partition from the command line on Mac OS X? In case someone wonders why: because for some people Disk Utility fails.
5
votes
2answers
8k views

how can I delete a partition (coreStorage logical volume?) from the Terminal?

I finally understood why Disk Utility will not change the partitions on my HDD, even though I added the most recent one myself (maybe significant: to test Yosemite DP) with it. Now I see it says it ...
5
votes
3answers
2k views

Partitioning Software

Is there an equivalent on the Mac platform to Partition Magic or GParted that will allow me to resize, move, and/or change partitions on the fly without formatting, or disturbing the data that is ...
5
votes
2answers
20k views

How do I change a disk partition map scheme from MBR to GUID Partitions Table?

I just finished the huge download of Mac OS X Lion, started the installer, and now I have a problem. The installer says that I must have the GUID-Partitions Table Scheme. The problem is that when I ...
5
votes
1answer
3k views

Can I have two Time Machine partitions on one hard disk drive?

I know that someone can use a partition on a hard disk drive for Time Machine, but is it possible to specify more than one partition on a single drive for this purpose? The scenario: My partner and ...
5
votes
1answer
583 views

Presence of a Linux partition causes FileVault2 setup to fail

I'm currently dual booting Mountain Lion and Ubuntu 12.04 on a rMBP. Everything works fine, but enabling FileVault fails with the error message: "Some information was unavailable during an internal ...
5
votes
1answer
2k views

Installing Windows manually

Here's the situation: I've got three partitions on my disk - EFI, OS, and a Data Partition + 40 gigs of free space for a Windows partition. I already deleted the Recovery partition to avoid conflicts ...
5
votes
1answer
3k views

My Windows 7 Boot Camp partition is missing. Why doesn't Parallels recognize it?

I installed Windows 7 on my (month-old) Macbook Pro using boot camp assistant. I basically used defaults throughout, so I don't think there's anything crazy about my setup. Usually, after doing this, ...
4
votes
4answers
27k views

How can I mount partition disk0s4 that became inaccessible after a clean installation of Mountain Lion?

The hard drive on my MacBook Pro has two partitions. One with the OS and the other with data. Yesterday, from a USB boot drive, I performed a clean installation of Mountain Lion to the OS drive. I ...
4
votes
4answers
20k views

How do I delete a BootCamp partition using Terminal's diskutil?

For some reason, the BootCamp Assistant app won't let me delete my BootCamp partition. How can I do so using Terminal and the diskutil terminal app?
4
votes
1answer
2k views

How can I modify an existing FAT partition without losing its data?

I have a 1tb hard drive. Long a go I split it it into two partitions. One I left as a Mac OS extended (journaled) with 990GB and one as FAT with 10GB. Now I would like to add about 100GB to the FAT ...
4
votes
5answers
14k views

Why can't I resize my existing partition?

I just finished downloading my copy of Lion and wanted to install it on a new second partition. I freed up just over 50 GBs from my hard drive and am now stuck trying to shrink my existing partition. ...
4
votes
2answers
10k views

Deleting a partition in Disk Utility fails. (Error: -69879)

This is the output in Disk Utility: Disk Utility cannot modify this disk because it contains CoreStorage physical volumes. Use command line distil instead. The selected partition won't be ...
4
votes
1answer
2k views

Can't resize (FileVault) partition after Bootcamp removal

I have a recent Mac with two partitions. The first one contains MacOS, and is encrypted with FileVault. The second one contained a Bootcamp Windows installation. Here is a screen shot: I deleted ...
4
votes
1answer
2k views

Why does Disk Utility create EFI partitions on external disks?

A technical told me about the EFI partition that... ...it's only there in case your computer will do an EFI update so the update files can be loaded onto the EFI partition. This is consistant with ...
4
votes
2answers
148 views

Move some free space to Macintosh HD (Startup Disk)

On my mac hard disk, Macintosh HD (Startup Disk) is almost full, I need to increase the size of Macintosh merging some free space from my another partition. But I tried all possible ways, free space ...
4
votes
5answers
9k views

Unable to increase Macintosh HD partition size with data in a subsequent partition

I can't make my main Macintosh HD partition bigger. It's limited by the FAT partition in the middle, which seems to be frozen, I can't move it down to make space for my main partition. To get some ...
4
votes
1answer
572 views

Apple recovery partition possibly creating problems in Ubuntu

Before reading, it may help to know I have a 13" Macbook Pro (model 7,1. Mid-2010). Recently, the HFS+ filesystem on my OSX became corrupt and after many trials and errors, it was clear I was going ...
4
votes
2answers
5k views

How do I recover an “invisible” OS X boot option in BootCamp (running on a 2013 MBA)?

Summary Unable to boot into the OS X partition of a 2013 MBA which dual-boots OS X and Windows 8 via BootCamp. Could "Repairing Disk" via "Disk Utility" damage the working Windows 8 partition? What ...
4
votes
1answer
454 views

50% SSD Space lost issue on MBA

I have an MBA 2009, model A1304. The Hard drive system information says its an "Apple SSD SM128". But when I look at the available and total space, I have one partition 28.8GB (bootcamp) and one ...
4
votes
1answer
5k views

Lost Windows after repartitioning with Disk Utility

I've just re-partitioned my hard-drive using Disk Utility. I shrank my Mac OS X partition and created a new one with the available space. However, after rebooting, the option to start under Windows is ...
4
votes
1answer
2k views

Why is the Mountain Lion Installer unable to complete due to recovery partition problems?

I just bought the Mountain Lion upgrade, but it's unable to complete. When I select my harddrive it says: Some features of OS X Mountain Lion are not supported for the disk “kollaps”. ...
4
votes
3answers
13k views

Can't read my Windows (Boot Camp) partition from OS X

I have a Boot Camp problem. Both OSes boot correctly, but when I'm in OS X, I can't access my Windows partition and vice versa. I know that I can't write, but it should be able to read. But I can't ...
4
votes
3answers
529 views

Triple boot (Lion, Win7, Ubuntu)

I currently have my MacBook Pro set up to dual boot OS X Lion and Windows 7. I am in the middle of a development project where I need to write some custom software that depends on proprietary drivers ...
3
votes
4answers
19k views

How can I get an unreadable Flash Drive to work?

I got this pretty cool flash drive as a gift and I can't seem to use it. Every time I plug it in, a pop up comes up that says: The disk you inserted was not readable by this computer. I opened up ...
3
votes
4answers
13k views

How can I convert a NTFS drive to HFS+ without having to move the data?

How can I convert a NTFS drive to HFS+ without having to move the data? It is an external drive of 2TB and I don't want to spend too much time moving the data. This is required in order to be able ...
3
votes
3answers
2k views

Why does my 3TB Seagate HD keep formatting as a Logical Volume Group

This is really annoying. I have a brand new Seagate 3TB 7200 RPM hard drive that I am trying to format/partition in Disk Utility. Every time I change any settings or erase the drive, it changes it to ...