That worked, thanks!

The full text of the error is:

"factorio" can't be opened because Apple cannot check it for malicious software.

This software needs to be updated. Contact the developer for more information.

superficially at least, seems like the same issue as this one from earlier in 2023:

viewtopic.php?f=49&t=105371

I'm a relatively 'low tech' Mac user - I assume the answer is yes, because I believe that is the default. Mechanically, installation looked like: - downloaded it (to default mac "downloads" folder) - opened the .dmg - in the default mac window that pops up, "clicked and dragged" ...

Downloaded this morning from the "download full game for Mac" button at https://factorio.com/download.

Apple M1 Max, running Ventura 13.6.2

Any ideas?