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Last active October 18, 2021 21:36
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Using DiskWarrior from macOS recovery
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diskwarrior-recipe1.md

This short tutorial explains how to run DiskWarrior 5 from the macOS recovery without using a USB key (ideal for helping someone over the phone).

  1. Boot the Macintosh into recovery mode (Cmd+R at boot)
  2. Ensure the Macintosh is connected to the internet
  3. Open a terminal
  4. Create a RAM disk (I chose a 1GB size)
diskutil erasevolume HFS+ 'RAM Disk' `hdiutil attach -nobrowse -nomount ram://2097152`
  1. Unzip DiskWarrior.dmg from the DiskWarrior5.zip Alsoft sent you, and upload it to some place that can be accessed via unsecured HTTP (I used transfer.sh)
  2. cd into the RAM disk and download DiskWarrior there:
cd /Volumes/RAM\ Disk/ && curl http://my.url.example.com/DiskWarrior.dmg -O
  1. Mount the disk image
hdiutil attach /Volumes/RAM\ Disk/DiskWarrior.dmg
  1. Copy DiskWarrior.app into the RAM disk
cp -r /Volumes/DM/Installer\ Items/DiskWarrior.app /Volumes/RAM\ Disk/
  1. Start DiskWarrior from the RAM disk
/Volumes/RAM \Disk/DiskWarrior.app/Contents/MacOS/DiskWarrior
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