Noté el mismo error exacto al aparecer una sesión de TeamViewer. Una búsqueda en Internet muestra esta discusión .
Probablemente, es un error de incompatibilidad para TeamViewer 11 con Sierra.
Problem 10:31:54.180203 +0100 kernel IOReturn IOAccelSurface2::surface_unlock_options(enum eLockType, uint32_t): surface is not locked.
Problem 10:31:54.259101 +0100 kernel IOReturn IOAccelSurface2::surface_unlock_options(enum eLockType, uint32_t): surface is not locked.
Problem 10:31:54.334998 +0100 kernel IOReturn IOAccelSurface2::surface_unlock_options(enum eLockType, uint32_t): surface is not locked.
Problem 10:31:54.411823 +0100 kernel IOReturn IOAccelSurface2::surface_unlock_options(enum eLockType, uint32_t): surface is not locked.
Problem 10:31:54.484102 +0100 kernel IOReturn IOAccelSurface2::surface_unlock_options(enum eLockType, uint32_t): surface is not locked.