Disable System Integrity Protection module on MacOS

Some files (such as The time machine backup) in Trash is system privilege. The current user can't delete them. To grant system privilege of access on macOS APFS, you need to disable file system protection, this is part of the System Integrity Protection module (SIP or “rootless”) introduced in macOS El Capitan and substantially severed in High Sierra. (Lean more about it http://osxdaily.com/2015/10/05/disable-rootless-system-integrity-protection-mac-os-x)

Partially disabling SIP is absolutely safe! Once you are done, you can re-enable it.

Step #1: Reboot your Mac

Click the menu on your Mac and select Restart.

Step #2: Boot into macOS Recovery Mode

Hold down Command + R on your keyboard immediately after your Mac begins to restart. Continue holding both keys until you see the Apple logo or a spinning globe. Startup is complete when you see the Utilities window.

Step #3: Run Terminal app

Click the Utilities menu and choose Terminal. The Terminal window will appear on your screen.

Step #4: Disable file system protection

In the "Terminal" window, type in "csrutil disable" and press "enter" then restart your Mac.

After that, run the product again, it will delete them.

How to Re-Enable Rootless System Integrity Protection in Mac OS X

Simply reboot the Mac again into Recovery Mode as directed above, but at the command line use the following syntax instead:

In the "Terminal" window, type in "csrutil enable" and press "enter" then restart your Mac.

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