I want to compress a Time Machine backup folder to a Zip file on another drive. I've set what I believe are the right preferences for Archive Utility. But when I try to run it, I immediately get "Error 13 - permission denied". It doesn't tell me whether the problem is with the source folder or the destination archive, and I don't know where to look.
I've read everything I can find on Archive Utility, but can't find the solution. Does Archive Utility need write permissions on the source item? If so, that could be my problem.
Also, what user does Archive Utility run as? Is there complete documentation for it anywhere?