iCloud Keychain

Once you’re signed in to iCloud in System Preferences, you can set up iCloud Keychain. This handy feature stores an encrypted version of any Safari usernames, passwords and bank cards in iCloud, saving you the trouble of having to enter them each time.

If you don’t already use iCloud Keychain and are interested in doing so, follow the steps at apple. co/2qzLu7m to set it up.

During the set-up process, iCloud Keychain will ask you to create a six-digit security code, which you can enter on additional devices to grant them access to your keychain. You’ll also be asked for a mobile number to verify your identity by sending a verification code in a text message.

If your mobile phone number changes and/or your forget your iCloud Security Code, open System Preferences’ iCloud pane and click Options next to iCloud Keychain to change the code or update your number.

If none of your devices are signed in to iCloud Keychain any more, you can reset the code, but all your existing passwords will be lost. In iCloud’s preferences pane, tick Keychain, then click Forgot Code.

If any one of your Macs is still authorised to use iCloud Keychain, you can change your security code or the phone number that receives verification codes in that Mac’s iCloud preferences pane.