I am having this same issue. I recently switched from Windows to Mac (at least I'm trying it out) and this is a big negative for me. I like to open my projects from the Finder, but it doesn't work properly. I find like others it is unreliable whether the project itself opens or the project file for editing. Furthermore, even when the project opens, there is something wrong with it. First of all, none of my open files appear, second, when I go to the Project menu, Close Project is disabled. Shouldn't you be able to close the project if it is open?
Why is there no response on this in 3 years?