I still use Processing on a daily basis. You should be able to use the modified version of the editor on your system if the gatekeeper doesn’t interfere. I’ll try to post the compiled app to DropBox and e-mail you the link. I did try to revise the current editor on the Processing website listed above, but they no longer allow editing of their code without committing the changes and sending a pull request, which I did. It would be nice if they made the changes to the code instead of us having to do it.