Now, about the bluetooth, I found someone on reddit mentioning that the new bluetooth adapters for the lenovos (4.0 version) work out-of-the-box with OSX and will pass the BIOS whitelist. Im using the easy solution, external dongle with proprietary driver but I will not stop until this is fixed, even if I have to desolder the chip. You probably know this already, but in any case here it is.
It is possible to flash it if you desolder the chip, flash a modified version and then use another card. The other alternatives are to use coreboot (open source BIOS), but with this I loose the hardware encryption of the drive (OPAL), and since it is not possible to use filevault 2 with OSX86, and non-encrypted drive is not an option in my scenario, I have to rely on the Lenovo BIOS.
As you might know, the x230 have signature procedure to prevent unauthorised flashes of the BIOS I have tried to modify the firmware in the middle of the process to allow my device ID with no success (the version number gets increased but the check remains for the old ID, so I might be missing something). The current solution is to flash another BIOS with the whitelist removed. Regarding the wireless I tried to rebrand another wireless card to show as an airport extreme, only to hit the wall with the whitelist present in the lenovos. For the last couple of weeks I have been running along with it as a "mobile" workstation and I am very happy with it, so I am looking into solving the final issues I have, and perhaps contribute a little bit to the benefit of all.
I can tell you that following your indications I was able to get my x230 running within a Sunday morning. Thank you very much for you most generous contribution, its very kind of you to have documented all your efforts and shared them with us.
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