The I/O Kit library provides the APIs and support for kernel-resident device drivers. It defines the base class for device drivers (IOService), several helper classes, and the families supporting many types of devices. The header files of the I/O Kit library are packaged in the Kernel framework.
| Framework | /System/Library/Frameworks/Kernel.framework |
| Header file directories | /System/Library/Frameworks/Kernel.framework/Headers |
| Companion document |
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