Q: icloud keychain

Hi moby1,

Thanks for checking out the Apple Support Communities. I understand you're wanting to approve your iCloud keychain for your iPhone from your computer. I've gathered some information about iCloud keychain that can help you. 

Use these steps if you're using OS X Mavericks v10.9 or later:

1.  Choose Apple () menu > System Preferences, then click iCloud.
2.  Select Keychain. If you want to, you can set a passcode to unlock your screen after sleep or after the screen saver begins.
3.  Enter your Apple ID and password.
4.  Follow the onscreen instructions.

 

How can I set up additional devices to use iCloud Keychain?

Set up iCloud Keychain for each device that you want to add. When you turn on iCloud Keychain on an additional device, your other devices that use iCloud Keychain receive a notification requesting approval for the additional device. After you approve the additional device, your iCloud Keychain automatically begins updating on that device.

How do I set up iCloud Keychain on a new device without another device to approve from?

If you can't access any of your other devices that are using iCloud Keychain, you can still set up iCloud Keychain on another device if you have these items:

• Your iCloud Security Code
• The device that is using the SMS-capable phone number you provided when you first set up iCloud Keychain. A verification code is sent via SMS to this phone number. If you can't access this number, contact Apple Support, who can verify your identity, so that you can complete setup on your new device.

After you complete the setup, your iCloud Keychain will be pushed from the cloud to the new device.

You can find more information including the steps above here: 

Frequently asked questions about iCloud Keychain - Apple Support

Get help using iCloud Keychain - Apple Support

Cheers!