I assume comment that "Aperture will keep up" is tongue-in-cheek. Apple abandoned support of Aperture several years ago, leaving user twirling in the wind. Many, of course, gravitated to Lightroom, which, as an Adobe product, is very much alive and well ... and getting better with each new release.
Actually Aperture has been keeping up as I used it for my previous Oly Omd 5 MkII. I believe Apple will up date shortly.
As to Lightroom. Being impatient I bought it today and the version which I assumed was up to date specifically listed th 5 MkII with an asterisk. When clicked it showed the RawFormat not yet available!