I have recently heard that a feature called
rootless that is going to be on El Capitan. This means that folders such as
/System cannot be modified by the root user and only signed kext (kernel extensions) can be installed on the computer.
I have not thought about it before but now I have I would like to make my own kext extensions. The only issue is I am not a paid developer so therefor I cannot sign my kext extensions.
When I upgrade to El Capitan would I be able to make by own kexts and install them on my system while still being able to boot my computer and not having to join the $99/Year Apple Developers Program?