Mac OS X 10.5.3: mach_kernel.ctfsys suddenly visible

That shouldn't be there...

mach_kernel.ctfsys suddenly visible Some users have reported an issue in which the file mach_kernel.ctfsys, a system component that is usually invisible, suddenly appears in the Dock or at the root level of the startup drive. In order to resolve this issue, simply make the file invisible again by launching the Terminal (located in /Applications/Utilities and enter the following command:

  • sudo chflags hidden /mach_kernel.ctfsys

then press return.

If the file is appearing in your Dock, issue the Terminal command:

  • killall Dock

then press return.

Feedback? Late-breakers@macfixit.com.

Previous coverage:

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