I downloaded vuforia-sdk-ios-1-5-8.zip, which resulted in vuforia-sdk-ios-1-5-8.app.
When I run the app, the error message is:
“vuforia-sdk-ios-1-5-8.app” is damaged and can’t be opened. You should move it to the Trash.
The zip has a file size of 33.2 MB, the app is 34 MB.
I am running Mountain Lion, the developer pre-release.