I have gone thru all the threads, I have deleted, re-installed.. i have done everything. My game/EP are all up to date.. Someone help please !

I am using a macbook, Thank you!!!

Well, if you're still having issues then you haven't tried everything =) How exactly did you install the games? Which threads have you gone through?

What worked for me was following these instructions (can't find the thread so....)

Install basegame
Run game
Install patch Run game
Install next EP (WA)
Run game
Install patch Run game, etc, etc....

It's tedious and I don't know what worked in comparison to what I'd done the previous time I installed, but everything works. And just remember when there's a new EP/SP out and mods/hack/CC hasn't been updated for that yet, nothing will work if you install it, so....