Browse the web privately on a Mac, iPhone, and iPad

Say you find yourself using the Web on a strange computer—maybe one owned by a relative or friend, or in a library or school. When using a computer or other device that you don’t control, you can enable a private-browsing mode to prevent leaving traces of your activities. That’s good for accidental security, as it keeps the next user of the device from visiting a site with your credentials, set in a cookie or via a login, when they didn’t intend to. This is an even better idea for shared computers where the subsequent user is someone you don’t know.

The Guest user in macOS lets you provide limited access to someone and deletes all associated data when that user logs out.

Likewise, you can set someone else up with private browsing on your Mac, so that they don’t have