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#Mac disk utility restore failure could not validate source install#
#Mac disk utility restore failure could not validate source password#
#Mac disk utility restore failure could not validate source free#

We have reported this issue to Apple (FB8889774) and we are currently awaiting a response. Some Big Sur cloned volumes do not appear in the Startup Disk Preference Pane, despite being perfectly bootable. In the past, the Startup Disk Preference Pane would list all available startup volumes, including volumes cloned by CCC (whether CCC used ASR or its own file copier).

Open RescueMac.dmg on your external drive and copy all needed files to the respective folders in your user folder.Some Big Sur startup volumes don't appear in the Startup Disk Preference Pane.

You will be booted to your internal drive now.

After a automated restart configure Yosemite.

You may have to click Show all partitions if your internal drive isn't visible initially.

#Mac disk utility restore failure could not validate source install#

Open Install OS X Yosemite on your external drive and install it to your newly created internal drive.

Since i started from my internal disk – named VMWare Virtual->System – i wasn't able to demonstrate the erasure with that one because it's the start volume and everything is greyed out) (In the pictures below i have chosen to erase my thumb drive.

Choose Erase and click the Security Option…-button, choose single pass of zeroes like in the picture below and OK then Erase.

Start Disk Utility and choose your internal disk in the left pane.

Check if you can open some files or folders. If you also want to copy your boot camp partition that might work: sudo dd bs=512 if="/dev/rdisk0s4" of="/Volumes/ExternalDrive/RescueWindows.dmg" conv=noerror,syncĪfter the process is finished enter exit and hit ↵, quit Terminal, open your external disk with the Finder and open the newly created RescueMac.dmg file. Often a larger integral multiple of 512 is recommended (e.g. Using 512 i got 4 MB/s, using 524288 (1024x512) i got about 65 MB/s (but wasn't successful copying my thumb-drive finally). If you enter a higher value for bs it should be faster.

The input file (if) is the Device Indentifier of the corrupted partition found in the diskutil list output above prepended by /dev/r hence /dev/rdisk0s2.

#Mac disk utility restore failure could not validate source password#

Hit ↵, enter your password (it will not be visible) and hit ↵ again to copy your internal Mac volume to an image file on your external disk though it contains errors.

Now enter in Terminal.app: sudo dd bs=512 if="/dev/rdisk0s2" of="/Volumes/ExternalDrive/RescueMac.dmg" conv=noerror,sync Before starting the copy open Disk Utility and unmount the partition SystemInternalDrive and possibly WinSystem then quit Disk Utility.

#Mac disk utility restore failure could not validate source free#

You need additional free space there in the size of your Windows partition if you want to copy that also. Please replace all names in the commands below with your original partition names.ĭata copying: You need at least 280 GB free space on your external hard disk to copy your Mac partition. You have to post the output here and i have to adapt my answer If your output looks really different, particularly if you have a Apple_CoreStorage device stop here. SystemExternalDrive is the name of your external system partition (if you have one) SystemUSB is the name of your thumb drive system partition,ĮxternalDrive is the name of your external data partition and WinSystem is the name of your internal bootcamp partition, Where SystemInternalDrive is the name of your internal system partition, The output looks similar to that: /dev/disk0Ģ: Apple_HFS SystemInternalDrive 280.0 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ģ: Apple_HFS ExternalDrive 1,5 TB disk2s2ģ: Apple_HFS SystemExternalDrive 500.0 GB disk2s3 The output looks similar to that: Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted on

Start Terminal in Applications/Utiilities/.

You will be booted to the thumb drive now.

You may have to click Show all partitions if your thumb-drive isn't visible initially.

Quit Disk Utility and open Install OS X Yosemite.

Choose your thumb drive in the left pane and repartition it to 1 Partition, click the Options-button, choose GUID Partition Table and OK, then Apply.

Copy Install OS X Yosemite to your external drive.

Attach your thumb-drive and copy all contained files & folders to your external drive, then start Disk Utility.