I think the problem is that bDeviceClass for 05ac:8215 is 255 (Vendor Specific) instead of 224 (Wireless).
Il solved this by adding the device to the generic bluetooth usb kernel driver.
Now it works but I had to remove keyboard and mouse from OS X before adding them in Debian => HID emulation do not work anymore at boot time...
I think the problem is that bDeviceClass for 05ac:8215 is 255 (Vendor Specific) instead of 224 (Wireless).
Il solved this by adding the device to the generic bluetooth usb kernel driver.
Now it works but I had to remove keyboard and mouse from OS X before adding them in Debian => HID emulation do not work anymore at boot time...