A99 and Apple Preview App?
On the Apple platform, the RAW converter is part of the OS. As the other respondent asked: what version of the OS are your running?
Whichever it is, run "Software Update" or go to the App Store and click the "Updates" tab. Install all available updates.
-- Kirby Krieger.
|In the Big Girl Chair by BryanKing|
from Baby Photography
|Ruby Red Dress by cjf2|
from High key portrait with RED
|Follow me home by eaa|
from Shades of Blue in Nature