Preparing Mac Device for the Installation of Mac OS X El Capitanīoth Mavericks and Yosemite are easier to download and install on Mac devices, however, this is not the case with Mac OS X El Capitan. If that doesn't work, you could try the following commands in Terminal (source: ) mdutil -i off -d /Volumes// Just drag the /Volumes/ folder from Finder into the box.Īfter that and a restart, I was able to create the install media. I have no idea why Spotlight would want to index a removable device, but you can disable it in System Preferences -> Spotlight -> Privacy. In my case, it was mds and mds_stores, which are related to Spotlight indexing. To find out which application is using the drive, use the following command in Terminal sudo lsof +D "/Volumes/". Sometimes Finder would hang when trying to eject, sometimes there would be a message about some program using the drive. In addition to the "Error erasing disk" message, my USB flash drive would not eject/unmount. The accepted answer "make sure the USB drive is not currently used by the system or your apps" is correct, though in my case, I had to dig a little deeper. I had the same problem with the macOS Monterey createinstallmedia script. If the problem is minor you can start in Safe mode that will correct some minor issues. You can open the terminal and use the fsck -fy to check repair the disk.
If the MBP boots in the Recovery mode using cmd-r then follow that process to restore your OS installation, or use the Disk Utility to check/repair the disk. If problems reoccurs get another USB stick with minimum of 8 Gig capacity (not partitioned). 30%.100%.Ĭopying installer files to disk…(this part can take 30 minutes) sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia -volume /Volumes/Mavericks -applicationpath /Applications/Install\ OS\ X\ Mavericks.app -no interaction.Įrasing Disk: 0%. This can be done from the Erase tab within the app make sure the USB drive does not have multiple partitions (that can happen, so turn to the Partition tab to verify and correct this).
I used this proces to make a bootable USB:įormat it, using Disk Utility, as a Mac OS Extended (Journaled) drive, named Mavericks.
To create a bootable USB you will need a Mavericks Installer package from Apple Store the 5.5 Gig file saved to MBA- but not run. We are dealing with 2 different problems.
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