custom baud not supported by OSX El Capitan

[arminbw]

The modified FTDI driver won't work in OSX 10.11 out of the box. The reason: every kernel extensions has to be signed now by a developer. And before, the developer has to request a specific certificate from Apple.

sudo kextutil -l /System/Library/Extensions/FTDIUSBSerialDriver.kext

will return

Code Signing Failure: not code signed

[arminbw]

The current solution to this problem is to deactivate the new system integrity protection:

• Boot to Recovery OS by restarting your machine and holding down the Command and R keys at startup.
• Launch Terminal from the Utilities menu.
• Enter the following command:
  csrutil disable