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OS X/macOS offers no built-in way of blocking outgoing connections but third-party apps like Little Snitch (circa £30) and Hands Off (£38.95), or an outbound firewall found in anti-malware tools from the likes of Intego, Sophos and Symantec, will do the job with aplomb.
password manager like 1Password (£3.99 a month) or Dashlane (£38.99 a year). These apps allow you to create and store robust passwords and sync them across all your devices. Crucially, however, they encrypt the data and allow allow access when you type in the master password.
The second app is from the same clever people who make KnockKnock, and it's called BlockBlock. This runs in the background of your Mac via a menu bar icon and monitors all the locations in which persistent apps install themselves.
If any app attempts to install persistently then a pop-up dialog box will appear telling you, and it’s down to you whether you allow it or ban it. Again, BlockBlock is not an anti-malware tool so doesn't know what's legitimate or not. That's for you to work out.
In addition to Bitdeferender Virus Scanner, we also recommend the occasional use of Malwarebytes Antimalware, which focusses mostly on uncovering and removing adware - which is to say, hidden code within certain apps that aims to hijack your computing experience to show adverts on the desktop or in your web browser.
In other words, any and all requests you make for websites via DNS can be snooped upon by others while the data is in transit.
The DNSCrypt app and project overcomes this by simply encrypting DNS requests both to and from the DNS server. You can download the app from the project's home page and setup is pretty simple once it's installed
a true HTTPS Everywhere extension for Safari is presently impossible to implement in a way that provides maximum security. Nonetheless, the SSL Everywhere extension brings something very similar to Apple's browser.
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