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The System Integrity Protection (vulgo “rootless”) feature of OS X El Capitan protects critical filesystem areas from root user modification attempts.

3 votes

Editing com.apple.atrun.plist on El Capitan

So boot to the Recovery HD partition (hold down Command + R while restarting), disable SIP and modify the item: In the menubar open Utilities->Terminal Enter csrutil disable Reboot to your main volume … and edit the file Reboot into the Recovery Partition again Enable SIP again csrutil enable Reboot to your main volume …
klanomath's user avatar
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4 votes
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How to safely install rEFind from recovery mode?

A less rocky but time consuming way is to disable SIP in Recovery Mode by entering csrutil disable in Terminal.app. … After rebooting to your main boot volume open Terminal.app, enter csrutil status and if SIP is disabled, install rEFInd. Then reboot to Recovery Mode again and enable SIP again with csrutil enable. …
klanomath's user avatar
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7 votes
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csrutil: command not found

The netboot image loaded by booting to Internet Recovery Mode apparently doesn't contain the executable csrutil. The OS X Base System loaded while booting to Recovery Mode should contain it though. B …
klanomath's user avatar
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9 votes
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macOS System Integrity Protection Configuration

It is possible to add your own protected directory to SIP: Boot to Recovery Mode and disable SIP Reboot and create a directory structure. … The restricted flag has no effect if SIP is disabled - the usual POSIX/ACLs permissions apply. With SIP enabled the files/folders are protected. …
klanomath's user avatar
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