Change iCloud feature settings
At any time after you set up iCloud, you can select the features you want to use and change other settings in iCloud preferences.
Important: To set up Messages in iCloud to share all your messages across devices, open Messages on your Mac, choose Messages > Preferences, click iMessage, then select the Enable Messages in iCloud checkbox. See Use Messages in iCloud.
If you set up a second iCloud account on your Mac, you can change feature settings for it in Internet Accounts preferences.
To set up iCloud features on your iOS device, Apple TV, or Windows computer, see the Apple Support article Change your iCloud feature settings.
Turn features on or off
On your Mac, choose Apple menu
> System Preferences, then click iCloud.Select each feature you want to use. Deselect any feature you don’t want to use.
Some features have additional settings you can change by clicking Options or Details near the feature name when the feature is turned on.
If you select the Contacts feature while your Contacts app is synced with Google Contacts, Google syncing is turned off. You should keep it turned off while using iCloud for your contacts.
Change account details
On your Mac, choose Apple menu
> System Preferences, then click iCloud.Click Account Details to change your iCloud name and photo, and your iCloud contact, security, devices, and payment information. See Change your Apple ID account information.
Change iCloud Photos options
On your Mac, choose Apple menu
> System Preferences, then click iCloud.Make sure Photos is selected, then click Options to turn the following features on or off:
iCloud Photos: See Use iCloud Photos to store photos in iCloud.
My Photo Stream: See Use My Photo Stream to share recent photos.
Shared Albums: See What are Shared Albums?
On a Mac with Aperture installed, see Aperture Help for information about the last two features.
Change iCloud Keychain options
On your Mac, choose Apple menu
> System Preferences, then click iCloud.If there’s an Options button next to Keychain, click it to change:
If there isn’t an Options button next to Keychain, your Apple ID is set up for two-factor authentication. In this case, when you set up iCloud on a new device, you allow the device to use your iCloud data simply by entering the login password or passcode of your Mac or iOS device that already has iCloud set up.
Whether your iCloud Security Code can be used to approve iCloud Keychain on new devices
The iCloud Security Code and the phone number used to verify your identity after you use the iCloud Security Code
If “Waiting for approval” appears below Keychain, click Options to enter your iCloud Security Code instead of approving this Mac from another device. If you forgot your code, you can reset iCloud Keychain.
Change Find My Mac details
On your Mac choose Apple menu
> System Preferences, then click iCloud.If “Location Services is off” appears below Find My Mac, click Details, then follow the onscreen instructions so you can locate this Mac.
For more information about using an iCloud feature in the Mac app with the same name, such as Photos or Notes, open the app, choose Help > [app] Help, then search for iCloud.