So, getting this prompt in BIAB2018 when I try to save, rename, or Render individual tracks.
I am using a MacBook Pro and have all BIAB on a separate drive. I get this prompt when I try to save to my rMBPro hard drive.
I CAN SAVE to my BIAB peripheral drive (7200rpm SeaGate) which hosting the BIAB program as well as all of the RealTracks files.

Odd thing is that I have been working with BIAB2018 for a couple of weeks and this problem just started this morning.

I imagine it could something to do with "permissions" on my Mac - but everything looks good there.
Where should I look next?