New answers tagged

0

First, boot from Recovery HD by pressing Cmd-R on startup. You will need to do this because modifications will be made to the startup drive (in this case, it's size). Now, from Recovery, open Disk Utility and select your Drive D/E. I'm going to assume you've moved all the data on these drives off, and they are empty now. This process will delete all the ...


0

The Time Machine partition was not being recognised but the non-time machine partition was being recognised. I couldn't repair or even erase/reformat the Time Machine partition through Disk Utility as it just didn't recognise it. I then split the non-time machine partition into 2 separate partitions with the intention of using one of them as a new Time ...


-1

Adobe did this perhaps, while updating Flash Player or playing online games which using Flash.


0

Since I wasn't able to resize the stack and seemingly no one was able to help me, I decided to to this: Make an image of the Fusion Drive Volume and save it onto an external hard drive Delete the Fusion Drive Rebuild the Fusion Drive Install OS X to let it create the Recovery partition Boot OS X, run Bootcamp Assistant Run the Windows Installer WITH NO ...


0

If you run disk utility from the command line, you get the same behaviour with the following output: # where `Title` is the name of the drive. diskutil secureErase freespace 0 /Volumes/Title/ Started erase on disk1s2 Untitled Creating a temporary file Securely erasing a file Creating a secondary temporary file Mounting disk Error: -69847: Couldn't create ...


2

Open Disk Utility and select the disk in the sidebar (not a partition). Click Partition in the toolbar. Enter the first partition information. Click the + button to add a second partition. Enter the second partition information. The size will be entered automatically from the remaining space. Click Apply.


1

I'm a little unclear what your configuration is... If your "128GB SD" is an external drive: Unencrypt the data, reformat macbook, encrypt data again. If your "128GB SD" is the drive that you wish to reformat: Copy the data to another external drive unencrypted, reformat your drive, copy the data back onto it and encrypt it over again. Is there anything ...


0

I think Disk Utility misses a proper EFI partition at the beginning of the disk. If you don't want to completely erase the drive you should be successful following the steps below: Open Terminal and enter the following to get an overview: diskutil list The 3 TB disk is your external disk. In the next steps I assume the disk identifier of your external ...


0

I tried the same above and it worked finally! Just select the disk (the partition) you want to get rid of > Erase as MSDOS and that's it!


6

Booted to Internet Recovery Mode you have to remove all non-OS X partitions, modify the partition types and then resize your main volume. The reason why you can't boot your Mac is the bogus partition type (FFFF-FFF....) of your main partition (i=2/sda2). Additionally the Recovery HD partition (i=3/sda3) has the wrong type. Preparation: Restart to Internet ...


0

Don't use Paragon ExtFS for OSX with El Capitan.The port is very experimental despite the fact that Paragon claims support for El Capitan. I've damaged two times a 1.5TB ext4 filesystem beyond irreparable limits, using two independent installations of EL Capitan (10.11.3) on a MacBook Pro and MacBook Air. fsck -y /dev/sda(x) on an linux box after file ...


2

Use Disk Utility from a working machine I don't know why this didn't work in recovery mode, but a friend suggested I plug the SSD into a working Mac with a USB adapter and try using the working Mac's Disk Utility to format the drive. I did, and that worked. Now I'm installing OS X on it using recovery mode. Maybe (I'm speculating) the version of Disk ...


0

Before you trash your drive, it is also worth restarting the mac. Sounds simple, but first boot after an OS upgrade or with a failed disk mount due to timing problems, and the system can get confused. A reboot sorts this out. Happened to me: disk utility couldn't erase or reformat, tried all of the above, including macissues' bash script for overwriting ...


1

Booted to your main volume or Recovery HD open Terminal and enter (El Capitan installed): diskutil cs resizeStack 7D5C38D3-6682-498B-A003-82580C9EC3D3 1120g or in (Mavericks/Yosemite installed) diskutil cs resizeStack 7D5C38D3-6682-498B-A003-82580C9EC3D3 0g Please add a comment if you get an error .


2

If you have your data safely backed up or don't care about losing it, you can follow these instructions to recreate your Fusion Drive. Boot into Internet Recovery or an OS X bootable drive. From the Utilities menu, open Terminal. Run diskutil cs delete 654B2807-197B-46D1-9919-B75C0290D33A to destroy your current Fusion Drive. This WILL lose all of your ...


3

Windows' Disk Management has overwritten the GUID partition table with something unknown. This usually only effects the partition table but not the content of your disk (though it seems to be gone)! A proper GUID partition table has to be restored. The particular obstacle here is: the OP neither has a thumb drive nor a second Mac. Preparation: Backup the ...


0

Booted to Internet Recovery Mode you have to remove the swap partition and then resize your main volume. Preparation: Backup your main volume Restart to Internet Recovery Mode by pressing alt cmd R at startup. The prerequisites are the latest firmware update installed, either ethernet or WLAN (WPA/WPA2) and a router with DHCP activated. On a 50 ...


-1

First of all i would use a gparted livecd/usbstick to find and destroy the missing partition, after deleting the misscreated partition i would left the space unformatted. Since you are using El Capitan the system is probably using core storage it is preferable to resize the Macintosh HD volume with diskutil from your mac recovery partition or a Mac OS X ...


-1

There was a firmware update for late model 13" MacBook Pros, possibly just the 2012, that properly enabled the SATA 3 in the optibay. In all other (non Retina) MBPs it's safest to use only SATA 2 drives for stability in the optibay, even though they report as SATA 3. Your HDD should have worked in the optibay, but may have been faulty, unless it was SATA 3. ...


0

I would suggest using dd, from the command line (Terminal). The syntax is as follows: sudo dd if=/path/to/file/<file> of=/dev/disk<your drive number> bs=1m It will prompt you for your password, and you will not be able to see it as you type. To get your disk number, you can run diskutil list from Terminal, and find the disk that most closely ...


0

A commercial ($20) option is Paragon ExtFS for OS X, which supports read/write mounting of ext2/3/4. I'm using it now in El Capitan. It has a few annoyances, such as seemingly not paying attention to mount options specified in fstab... But generally seems to do the job fine.


0

You need to use /dev/disk4 in place of just disk 4 in your command. It should read like this diskutil partitionDisk /dev/disk4 1 GPT HFS+ newdisk R


1

Remote Synchronisation: rsync Consider using OS X's Terminal.app and included rsync command line tool to safely copy the data: sudo rsync -vaE --progress /Volumes/SourceName /Volumes/DestinationName See Fastest and safest way to copy massive data from one external drive to another for how this command works and what each section means.


1

There's no such thing as "Built for Snow Leopard". That labeling just an old habit PC manufacturers have for Windows, but it doesn't apply to Macs at all. If Apple lets you run the OS, that means they tested it, and should work just fine. The reason you can't resize those disks is because they are formatted as "ExFAT", and OS X doesn't support resizing ExFAT ...


0

My bro did some clicking after that he says the Seagate 1 TB Backup Plus external hard drive was showing up in finder and desktop on his MacBook Pro. He did say it could be due some software corruption because he clicked something and probably something got installed. He doubted the Seagate dashboard. Below are the troubleshooting steps that resolved the ...


1

Download, install and start Disk-Arbitrator. Activate it in "block mount" mode. Now execute sudo dd if=/path/to/file of=/dev/diskN [operands]. The resulting volume won't be mounted and no file will be created nor a folder will be changed: sh-3.2# ls -laO total 0 drwxrwxr-x 7 user staff - 306 17 Jan 22:21 . drwxrwxrwt@ 8 root admin hidden ...


0

I just started having this exact same problem with my FreeAgent Go drive which has always been working perfectly. Like the original poster I cannot see the drive in Disk Utility but it does show up in System Information. After a little more digging I found that the OS is trying to repair the volume BEFORE letting Disk Utility see it via an process named ...



Top 50 recent answers are included