Can you share a link to the file you are having trouble with so I can have a look? Likely a file with the same name is already on your system so if you try changing the default location of name of the file it will work again.
I read some other threads after posting this. Seems if you download the Adobe Forms Central App to your computer, you combat the problem. It is running much smoother now and allows me to save .pdfs to my mac no problem. I thought it was a problem with Acrobat but it turns out is is an issue with using the online program versus the App. I highly recommend the app.
Thanks for responding though.