What iPhone SDK version I need?

Unity Engine
,
1

Please can anyone tell me what version of iOS SDK I need install to start developing with iPhone Unity?
In the Apple’s developer page I only see the 4.1 version that is for Snow Leopard only.
Is there any other version available I can use?
Thanks

2

No; if you don’t have Snow Leopard then you need to upgrade. It’s only $30.

–Eric