RC=0
before detach:  173693530 (0x0a5a5a5a)
after detach:   sysctl: unknown oid 'kern.df4773_sensor0'
after spray:    sysctl: unknown oid 'kern.df4773_sensor0'
df4773: detach: 4 sensor key chunks freed; sysctl oids removed first (fixed order) (== smc.c:507-512 before device_delete)
df4773: detach(fixmode): oid ctx freed BEFORE freeing backing store
malloc_uninit: 64 bytes of 'df4773' still allocated on cpu 6