Thanks for the prompt reply, guys. I'm sorry I am a little slow and dim with this tech stuff.
I don't have antivirus on this Mac. Also, the library is too large (big reader) so it had to be put on an external hard drive since its a Macbook air with limited storage. The library has been there for quite some time and no problems with conversion before.
I don't know what RWX n77 is or a CHMOD
I can try to answer questions as best I can tho. Thank you again for the assistance.