HOWTO: Replace protected codesign file [MACOS]

how_to_replace_protected_codesign.md

HOWTO: replace protected codesign file (or any other system file)

1. Reboot in recovery mode (poweroff, hold Command + R and powerup)

2. Open terminal

3. Mount disk in write mode

mount -uw /

4. Change current directory to your system root

cd /Volumes/<Your System HD Name>/

5. Copy original file

cp ./usr/bin/codesign .

6. Replace file with empty one:

echo "" > ./usr/bin/codesign

7. Place new content using vim:

vim ./usr/bin/codesign

content:

#!/bin/sh
echo "$@" >> /tmp/codesign.log
exit 0;

8. Reboot and do what you need to do ;)

How to roll back??

Repeat steps 1-4.

5. mv ./codesign ./usr/bin/codesign

6. Reboot