How can I remove a pre-installed application on macOS Sierra I need to remove one of the pre-installed applications (Safari in my case) from a macOS Sierra system. Yet simply deleting the app, installing 3rd party "cleaning" software or any attempts to delete it via the terminal remain unsuccessful. I found out that since Mac OS 10.11 apple features so called 'System Integrity Protection', that basically forbidds its users to modify or uninstall 'system relevant applications'.

So how can I remove a pre-installed application on such a system?

PS: I already know that this may be a bad idea in regard of future upgrades. Nevertheless let's just assume I'm willing to take the risk and am just looking for ways to get this done.
You technically can remove Safari by weakening your system's security protections and disabling SIP.

Again: Do not do it!

Steps:


Reboot on the recovery partition (hold cmd-R while rebooting until the Apple logo appears)
Open the Terminal from the Utilities menu
Type csrutil disable
Reboot
You should now able to remove Safari (if the Finder does not let you do it, use the Terminal and type sudo rm -fr /Applications/Safari.app)
I'd highly recommend you reactivate SIP then by rebooting and typing csrutil enable (it won't reinstall Safari)