Hello freinds
My name is Alain and Im new unity 3D. I have bought the Unity Development Essentials Book from Will Goldstone. Im not done jet with the book.
My inters is to develop some applications for the iPhone.
After reading and going step by step of this tutorial
(http://learnunity3d.com/?tag=iphone-unity-tutorial)
I always get stuck in the same point. The writer in the first tutorial, page 9, in step 10, that in the SDK3 you should not have any errors on the Provisioning Profile.
In my case, i always get the same error, and this after doing it step by step. The message is:
“A valid signing identity matching this profile could not be found in your keychain.”
I have already deleted started over buy here Im always game over. I have tried under Applications/Utilities/Keychain Access to request a certificate from a certificate authority, like in the "How tos" from the iPhone Developer Program Portal in the iPhone Dev Center.
Any help??
Thx
Hello!
First of all, please resize that image, its really difficult for most of us reading what your problem is if you attach those images that big.
on the other hand, try this:
Access to your keychain, delete the provisioning on your iPod/iPhone
Delete any certificate you have on your machine
Redo all again.
Have you ever tried to download an application (a demo from apple) to your iPhone?, does it works?, if no, then follow apple’s tutorial first 
By the way, I’ve never read the will’s tutorial and they might be good but read the official how-to’s from apple where they explain everything , another resources might help you
hope it helps! 
Not much help to offer unfortunately, but I will repeat naruse’s advice. Skip Unity for now, download a demo app from the iPhone Dev Center and get that loaded on your device. That’s the simplest way to troubleshoot.
This error message is fairly common and I have found that even when everything is correct, XCode likes throwing error messages, just to screw with your day. Often, restarting the devopment device, the Mac or both, will make the error magically go away.
If that doesn’t work, delete your certs and provisioning files and start again. Good luck!
My bet: your app identifier is just wrong on the provision you created. It won’t work, no mather what you do.
company name 1. letter is likely upper case since OS 3.0 and the iphone provision certification is VERY picky on such small details.
Also you should save yourself time and create a wildcard profile for your development, only specially named ones for deployment. Will save you a lot of time and nerves especially when a file is beeing “locked” on the device requiring a complete reinstall of the OS to get it up again.
Also just to ensure: you installed both certificates, right? The global one as well as your specific developer certificate
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