This issue has been stated on here once before, but I just wanted to bring it to light, once again.
I have a brand new Macbook Pro with a nice SSD, 8GB of RAM, 1GB Graphics and a a 3GHz i5 processor. I am aware this is no gaming PC by any means but, with all the hype of being able to run this program on Windows, Linux or OSX, I thought it would at least run on my $2,000 computer.
I have tried running the program with minimum settings, no extra scenery, no reflections, no other planes, and it still won't even give me 15 fps, (before takeoff!) and, as a matter of fact, this program begins to lag even in the setup menus.
I fear, unlike the previous statements made here that this is just beta and funny things happen in beta, that this is a very critical issue with this program that relates to the core of how it was programmed.
I am an actual pilot who would love to use X-plane to practice flying to new airports before I do the flights in real life but, as of now, I don't see that becoming a reality.