First off forgive me, I wasn't sure which prefix was more appropriate between 'Emulator Problem' and 'Game Problem' so I winged it.

So, it's like this:

I've recently started using VBA-M on my Macbook Air 2012 and it's been working well.
I've been playing Pokemon Shiny Gold and started a file in Fire Red without issue.

Now, however, I've just downloaded a Pokemon Red ROM but am unable to open it in VBA-M. It's grayed out in the finder when I browse from the software.

I didn't have this issue on the original VBA on my Acer.

Does VBA-M not play GB games?