![]() ![]() Restore the image to as USB drive $ sudo asr -source InstallESD. Successfully scanned image "/Users/paul/InstallESD.dmg" Scan the image to make it ready for restore $ asr imagescan -source InstallESD.dmgĬhecksumming partition of size 0 blocks.doneĬhecksumming partition of size 4 blocks.doneīlock checksum. Download the Lion installer from Apple App Store. What you get: A USB stick you can boot off and repair your Lion installation from. What you need: an 8G thumb drive and OS X Lion from the App Store. Make a copy of the installer dmg: $ cp "Install Mac OS X Lion.app/Contents/SharedSupport/InstallESD.dmg" ~ Option 1: Put a full bootable Lion installation on the USB Drive with a recovery partition. (Other answers you find are out of date, as they change every time Disk Utility’s UI changes, which is a lot.)īefore you begin, make sure to partition the USB drive as GPT and format it as Mac OS Extended (Journaled) (aka JHFS+). Here are instructions for doing this in the Terminal. ![]()
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