Notes about the CTFSYS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The CTFSYS file type is primarily associated with 'OS X' by Apple Inc.. The Mach kernel in Mac OS X is in mach_kernel.ctfsys on the root folder of the drive.