The container "…" must contain only one certificate and its private key

I am unable to install a mobile provisioning certificate on iOS 5 because I get this error:

The container "…" must contain only one certificate and its private key.

I used the same process that worked in the past but on iOS 5 it doesn't work and I have no idea how to export my certifica开发者_StackOverflow中文版te in a "desirable" state.

I was able to fix this by exporting the private key from the "Certificates" Category of Keychain, rather than exporting the Key directly.

So export the NAME of the cert, not the private key itself, and you should be good to go.

I think a more specific answer is that you...

• open up Keychain app
• (I am assuming you already have the key pair of your Identity in a keychain )
• Like @Brent Shaffer says, choosing from "Certificates" is more straight forward (The reason being is that the Keychain App logically groups the Certificate and private key for identities when using the "Certificates" view)
• SHIFT-select both your SMIME certificate and its corresponding private key
• right-click the selection and choose 'Export 2 Items'
• Save as a (.p12) file with a very strong password
• email the .p12 file to your email account
• And from your iphone Mail app you can tap the .p12 file
• and Mail will suggest to import this as a Profile. You will need the password from earlier.