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To finish creating the bootable USB flash drive El Capitan installer, enter the commands given below. However, the error can also be avoided by applying the following steps given in the section below titled Alternative to Using the asr Command. Therefore, I was able to ignore this error. Inspection has determined that the part of the command that failed is unimportant. I suspect this is an fatal message because an exit status of 1 was returned. Some versions of macOS will produce this message while other versions do not. asr: Couldn't personalize volume /Volumes/OS X Base System Sudo asr restore -source /Volumes/esd/BaseSystem.dmg -target /Volumes/MyVolume -noprompt -noverify -eraseĪfter entering the last command given above, you may get a message similar to the one given below. Hdiutil attach InstallMacOSX.pkg/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/esd Pkgutil -expand /Volumes/Install\ OS\ X/InstallMacOSX.pkg /tmp/El\ Capitan Note: The easiest way to enter the commands is to copy from this document and paste in the Terminal window. A folder named El Capitan will be created in the /tmp folder to hold temporary files. Use the Finder applicaition to open InstallMacOSX.dmg.Įnter the commands given below. ![]() When finished erasing, click on the Done button. Use the setting shown in the image below. Highlight the flash drive, then click on the Erase button. If the Disk Utility window has a View pulldown menu, make sure Show All Devices is selected. Use the Disk Utility to erase a 16 GB or larger flash drive. #Macos big sur cannot be installed on macintosh hd how to#Use instructions on the Apple website " How to get old versions of macOS" to download InstallMacOSX.dmg. The following steps can be used to create a USB installer for El Capitan.
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