How can I remove the code signature from a binary so that I can patch it without the binary refusing to run afterwards?

Needless to say, I'm not the original creator of the binary, nor I have the certs that were used to sign the binary.

  • if the app's name I want to remove the code signature is a two words with space between them, how should I type it? Thanks in advance
    – user34480
    Commented Sep 24, 2020 at 2:29

3 Answers 3


There are tools for that, as well as a codesign flag --remove-signature

First two should work the same. The codesign flag is undocumented and so YMMV (A user reported in a comment the codesign produced a corrupt executable).

You should use any of them with caution and backup the application before using them.

  • Would you recommend me using one of those 3 tools in particular or any of those would work exactly the same for me and my use case? Commented Sep 30, 2016 at 12:13
  • Added the question to address your questions here
    – NirIzr
    Commented Sep 30, 2016 at 12:24
  • 3
    codesign --remove-signature seems to create malformed executables, at least in some cases.
    – zneak
    Commented Sep 6, 2017 at 16:20
  • 1
    @zneak thanks for sharing your experience. Edited my answer to note that.
    – NirIzr
    Commented Sep 6, 2017 at 16:27

Another blunt way that seemed to work for me on Catalina (note that this strips all attributes):

xattr -cr /path/to/your/program.app

codesign --remove-signature /path/to/binaryAppName

Tested it on macOS 10.15.3 Catalina, works perfectly.

You can edit the hex values of the now removed code signature binaries and it will launch on macOS with out a hitch.

  • This answer doesn't offer any new information. The accepted answer (from 2016) already discusses the codesign --remove-signature approach
    – julian
    Commented Mar 19, 2020 at 15:40

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