Dragonframe 4.2.4: NO
Not compatible with macOS 10.11 (El Capitan)
Dragonframe 3.7.4: NO
Dragon Stop Motion 2.3.8: YES
(Dragonframe was previously called Dragon Stop Motion)
The Olympus E-420 provides a live view via analog video output. The resolution depends on the output type (NTSC/PAL) and the aspect ratio (NORMAL/WIDE). You will need an analog to digital converter to use this video source with your computer.
Dragonframe controls the Olympus E-420 ISO, shutter speed, aperture (with digital lens), image quality, and size.