We already had
reported about the development two months ago, now it should be available from Monday: We are talking about the BRAW Toolbox by Australian developer Chris Hocking.

BRAW Toolbox
Thanks to the freely available Blackmagic BRAW SDK, he has managed to implement a native import of Blackmagic's RAW files into Final Cut Pro. Neither Apple nor Blackmagic Design have worked towards making this possible in Final Cut Pro in the past.
There was already a tool called "Color Finale Transcoder", which in principle allows a BRAW file import in Final Cut Pro. However, this extension for 59 dollars used a not entirely irrelevant diversions via background transcoding, which is of course not as elegant as simply opening and editing the files in the media management and in the timeline.
Alternatively, users still had the option of batch transcoding, which of course meant a lot of storage space and additional time.
With the BRAW Toolbox Workflow Extension, which will be available on Monday, the clips can now be imported directly. The associated RAW metadata can also be changed quickly and easily. This way, you can copy and paste metadata from different BRAW clips or save presets for certain metadata attributes.
Once imported into Final Cut Pro, RAW metadata can be changed at any time - typical RAW changes such as ISO, exposure, colour temperature and hue can even be controlled via keyframes.

BRAW Toolbox in Final Cut Pro
The decoder settings are also subject to direct user access. There are automatic decode quality options for HD and UltraHD projects. One can also work with a low decode quality and then apply a "Global Setting" to force full quality before export.
BRAW Toolbox has been used by over 250 beta testers so far and is now scheduled for release on the Mac App Store on 30 January. It will be priced at US.99 and is to be 50 per cent off for the first week only as a thank you for "early adopters".
There will be no free trial and it will only be available from the Mac App Store as a one-off payment.
Those who want to try it out beforehand can currently still install the last beta version via
the developers' page using Testflight.