Steelsring release a firmware update for their GFX AF adapter, which you can download for Windows Here and Mac Here.
2020/06/07
1) Bug fixes
2) Improve support for Sigam Lenses (50 ART)For Mac OS 10.7.5+ users only:
You have to disable Gatekeepr before start firmware updater, and remeber to enable it again when it’s done.
To disable it: sudo spctl –master-disable
To enable it: sudo spctl –master-enable
Please refer to http://osxdaily.com/2015/05/04/disable-gatekeeper-command-line-mac-osx/ for more details
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