When attempting to copy a framework into the Frameworks folder of my project in Xcode, I get the error
Could not copy /Developer/Platforms/.../Frameworks/OpenAL.framework to /Users/.../OpenAL.framework
I had accidentally copied the wrong framework with the same name into the project earlier and deleted it, but now I can't copy the correct one in? How do I get totally rid of the wrong version before copying the appropriate version in?
Thanks in advance!
Why are you trying to copy OpenAL.framework into your project at all? You don't need to copy a framework into your project directory to link against it, and OpenAL.framework is provided by the operating system (as you can tell from it being located under /Developer.)
Also, be aware that third-party frameworks aren't supported on iPhone, you can only use static libraries. I mention this because you added the iPhone tag to your question, so I assume you're building an iPhone application.
You can't add a new framework for iPhone development. Instead, you should add an existing framework, and go find the framework in (for example) /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk/System/Library/Frameworks/