black and white

Its actually embarrassing what Im about to ask.
I have shot film for a while , but it has always been color.
I have recently just shot my first roll of black and white illford pan f 50 film.Its 120 mf btw.
When I got it back from the lab its reversed whats black is white and white is black.

I scanned it in my computer using the espon v700 and have aperture as my editing program.
My question is how do I turn it to an actual black and white image.

Thanks

Your scanner should have the ability to choose between postive or negative... you want the latter. Or, you can just flip it in your editing program; there will be a negative function that will flip it.