Improve your Mac’s security
El Capitan’s System Integrity Protection feature locks down your Mac’s System folder for better protection. If there’s a time when you need to temporarily disable it, restart your Mac with ç+r held down, then choose Utilities > Terminal. Type
csrutil disable and press ® , then restart. When you’re done tweaking, return here and type
csrutil enable to switch SIP on.
Avoid dangerous websites
How safe is the website you’re about to visit? Don’t take any chances: install a free browser add-on called WOT (Web of Trust) from mywot.com, which provides traffic-light security and privacy ratings for sites, and will pop up warnings should you attempt to access sites known which are known to be dangerous.
Apple is rolling out two-factor authentication, which basically means you’ll need to enter a verification code the first time you use your Apple ID and password on an unrecognised device.
If you want to tighten security on your account further, look to enable two-step verification too, which will require you to enter a four-digit verification code sent to a trusted device each time you sign into key services or make purchases from a new device. Browse to http://apple.co/1N9SqsI to set it up.
If you’re using Keychain to store your usernames and passwords, be aware it is vulnerable to attack, as was discovered by researchers in 2015. Make sure you haven’t been compromised by installing and running Malwarebytes Anti-Malware from malwarebytes.org, which also detects and removes adware and other malware too.
Encrypt your Mac
Worried about sensitive files you’ve stored on your MacBook? Make sure you encrypt its storage to keep your data off-limits in case the MacBook is lost or stolen: open System Preferences, click the Security & Privacy icon and then click the FileVault tab. Click ‘Turn on FileVault’ and follow the prompts to keep your files safe.