How to use ldid?

Question

I am trying to run unsigned application on iOS 5.1/iPhone 4s (jailbroken). What I did:

1. Disable code signing in XCode.

2. Built unsigned iPhone

Answer 1

The error assert(2:false) comes from the fact that HelloJB (not HelloJB.app) is write protected!

1. Start Terminal.app
2. Go to directory HelloJB.app
3. chmod +aw HelloJB
4. ldid -S HelloJB works !