Post by Stephan WittI'm afraid you're talking about different things.
The math preview fails silently if enabled but non-functioning.
The document preview raises an error - your case?
I'd like to help you solving this Yosemite problems.
But I don't have enough machines to try and install all releases.
At the moment I am bound to 10.8 and 10.9.
I'll see what I can do with an external disk if I find the time.
Stephan
Yes, I think we're discussing two different things. I'm talking about
instantpreview of math inside the LyX document. The view
command (cmd-R) works finefor me.
I tried to start LyX from the command line to see if that fixed
the instant previewproblem, but that does not seem to be the case.