Show us a few of the photos you've taken that require lossless raw please.
I just switched to sony from nikon and I'm very happy but the first pictures I took with A7II were bags of coffee in studio (flash + 90mm macro) and I got something very surprising, kind of jpeg compression artifacts around text and moire.
I shoot the same bags a week before with a nikon d610 and there were no problems, so I think in part the problem is raw compression.
(the following screen capture are taken in PNG so what you see is what I get from Lr, maybe watch the original file and not the preview)
Your problem there is that this is a SCREEN CAPTURE, not the original output RAW conversion. What you're seeing here is that 1. the capture app may be compressing or otherwise being altered (pixel level clarity is very low), 2. the image could have any unknown amount of adjustments to create that lighter halo, which is almost always a sign of sharpening.
Since you have no original image to show, no solid conclusions can really be derived. It's a poor looking screen capture of an image that could be anything, with any number of factors affecting it.
the raw is unedited exactly like the one I compare to (nikon D610).
So let's see the RAW rather than a picture of a picture.
Seems odd you can't export the RAW as TIFF or PNG and crop that to prove your point. Either way, the halo you see isn't cRAW.
The screen capture app is the stock Mac OS X, it saves in PNG so no compression and the file is exactly what I see in Lr.
Assuming your screen capture is 100% exactly the same as the RAW in LR - it doesn't mean there isn't any processing of the image going on, that you have some kind of scaling of your desktop happening or scaling of the image either in LR or at some other point.
We don't even know if you might not be showing us a thumbnail JPEG. That's really what it looks like to my eyes - the artifact halo is quite typical looking for that.
The problem here is very simple to my eyes, raw compression affects fine details in raw, not a major problem but a step back from my previous camera.
And again, as people keep telling you, you're operating from the false assumption that the image you posted exhibits lossy compression cRAW artifacts, which it does not. It's nothing like cRAW compression.
What you see there is a halo effect indicative of scaling, sharpening or other image adjustment either in the screen capture app or your Mac - desktop UI shell, who knows? Either way, it's not the A7 compression that's causing the problem, here.
Hope Sony will give lossless raw to version 2 A7
The A7II has the same ARW compression as Sony has been using since the SLT and DSLR days. All signs point to the A7RII having the same.
Edit: Now that I think about it, I'm wondering if you're showing us a screen cap of a 2:1 zoom in LR. Obviously that's going to make the thing look
soft, and if you have default sharpening applied, there's your halo effect.
