New Raw Support in macOS 10.12.4
The most recent Sierra update added these cameras to the RAW Support:
Digital camera RAW formats supported by iOS 10 and macOS Sierra - Apple Support
Fujifilm X-A3
Nikon B700
Nikon D5600
Olympus OM-D E-M1 Mark II
Olympus PEN E-PL8
Panasonic LUMIX DMC-TZ82 / DMC-TZ85
Phase One IQ1 100MP / IQ3 100M7
Sony Alpha ILCE-6500
Sony Alpha ILCA-99 II
Sony Cyber-shot RX100 V
MacBook Pro (Retina, 15-inch, Mid 2015), macOS Sierra (10.12.4), 2,8 GHz Intel Core i7, 16 GB, 1TB