The run destination My Mac is not valid for Running the scheme xxx

I have been working in oF7.0osx in my macbook running osx 10.6 since 2011.

I just got a new macbook pro running osx 10.12.

I copied the entire oF7.0 folder to this new computer, but when I try to build a project, xcode says “the run destination My Mac is not valid for Running the scheme ‘emptyExample’”.

How can I fix this? Thanks in advance.