How to undo codesign?

问题:

In an attempt to codesign gdb, I used an incorrect certificate, so now gdb is codesigned but does not work as expected.

I attempted to codesign gdb using the correct certificate, however codesign complains that gdb is already signed.

So how to undo it?

The codesign command I used was:

codesign -s gdb-cert gdb 

回答1:

It's not well documented at all, from what I can tell, but you may be able to remove code signing via:

codesign --remove-signature gdb 

回答2:

I had a problem with removing signature as suggested by Micheal:

unsupported type or version of signature 

Finally I used -f flag and force loaded new certificate.

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