The firmware update extends the compatibility adapter Sigma MC-11
Sigma has released a new version of the firmware for the adapter MC-11. The update makes the adapter compatible with the new lenses.
More specifically, a variant of the MC-11 SA-E lens to Sigma after the firmware update becomes compatible with lenses Sigma 14mm F1.8 DG HSM Art and the Sigma 24-70mm F2.8 DG HSM OS Art. Option MC-11 EF-E lens mount Canon EF becomes compatible with lenses Sigma Cine Lens 14mm and 135mm T2 FF T2 FF.
The update is available on the website of the manufacturer. To install it you will need a docking station, Sigma USB Dock.
Source: DP Review