Over the last year, I have come across many Macs which have been left with serious vulnerabilities. Here are four common ones, and how to put them right.
csrutil
Why can’t you restore Chess.app from a backup, or trash Text Edit? How should you check that SIP’s protection is enabled on your Mac?
SIP protects your Mac from rogue KEXTs too, and prevents tools from attaching to protected processes.
When an app ran fine, but crashes in El Capitan, it may be SIP’s fault. Here is how to check, and more about SIP.
The Eclectic Light Company 