09/18 Update:  Begin with 10.11.1, the Apple Internal flag won’t allowed to be set. This Apple Internal status provided by csrutil tool shall always be “Disabled” even if you set this bit in your csr-active-config. 08/19 Update: An updated csrutil tool has been released with the DP7 of 10.11 El… Read moreUsage of csrutil and Standalone OS X 10.9 Recovery HD Backup