There is a new firmware update for Metabones Canon EF to Micro Four Thirds Smart Adapter / Speed Booster V2.0.
Benefits and improvements: f/8 autofocus support for EF Extender 1.4x and EF Extender 2x (all versions).
Firmware update for EF-M43 (Windows) http://www.metabones.com/article/of/EF-M43_Firmware_Win
Firmware update for EF-M43 (Mac) http://www.metabones.com/article/of/EF-M43_Firmware_Mac
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Thanks Anonymous