Thanks for the tip! Yeah, a 2009 laptop is reaching pretty far back into history in terms of computer time
. But Universe Sandbox does do a pretty good job of running on a huge range of hardware. Generally speaking, that message on starting Universe Sandbox is just a warning, as you saw when it ran (relatively) fine.
As a heads up, we do raise our minimum and recommended requirements over time as we update Universe Sandbox to take advantage of newer technology. We try to offer a timeline of major releases, though, so if the day ever comes when it no longer runs on that hardware, you should still be able to access and run the last compatible version.
Thanks again for the tip, we'll keep that in mind for any future users with the same issue!