How can I codesign an app without being in the mac developer program?

Question

When I try the following:

mba:Utilities ryan$ sudo codesign -fs /Applications/Utilities/Boot\\ Camp\\ Assistant.app/

I get this error:

Answer 1

You need to create a self-signed certificate.

1. Open Keychain Access.
2. Choose Keychain Access > Certificate Assistant > Create Certificate ...
3. Enter a name
4. Set 'Certificate Type' to 'Code Signing'

Then, your command should look like this, if your certificate name is my-new-cert:

sudo codesign -fs my-new-cert /Applications/Utilities/Boot\ Camp\ Assistant.app

---

This works on OS X 10.10 Yosemite.

Instructions from here: http://support.apple.com/kb/PH7173