Using SecCodeCheckValidity

    func codeCheck() -> Bool
    {
        var myCode : SecCode?
        var status : OSStatus?
        var requirement : SecRequirement?
        var errors : Unmanaged<CFError>?

        let entitlement = "anchor apple generic and identifier = \"com.yourapp.example\" and certificate leaf[subject.OU] = Y0URTEAM1D"

        status = SecRequirementCreateWithStringAndErrors(entitlement as CFString, [], &errors, &requirement)

        if status != errSecSuccess
        {
            NSLog("SecRequirements failed with status code \(status).")
        } else
        {
            status = SecCodeCopySelf([], &myCode)
            if status != errSecSuccess
            {
                NSLog("SecCodeCopySelf failed with status code: \(status).")
            } else
            {
                status = SecCodeCheckValidity(myCode!, [], requirement)
                if status != errSecSuccess
                {
                    NSLog("SecCodeCheckValidity failed with status code: \(status).")
                } else
                {
                    NSLog("Codesigning: valid")
                    return true
                }
            }

        }
        return false
    }