iCloud stores your presentations and keeps them up to date on your computers and iOS devices that use the same iCloud account. You always see the latest version of your presentation, no matter where you made your last edits.
For seamless sharing and syncing of presentations, use iCloud Drive, iOS 8.4 or later on your devices, and OS X v10.10.4 or later on your computers.
You can also use Keynote for iCloud on the web to create and edit Keynote presentations using a supported web browser on a Mac or Windows computer.
Open System Preferences on your Mac, then click iCloud.
System Preferences is in the Apple menu at the top-left corner of your screen.
Sign in using your Apple ID, or request a new Apple ID and then sign in.
Select any of the options on the first screen, then click Next.
Select the iCloud Drive checkbox, then click Options.
Select the Keynote checkbox, then click Done.
When iCloud is turned off for Keynote on your Mac, edits you make or new presentations that you create aren’t saved to iCloud, and presentations that are newly created or changed on other devices or computers aren’t available in Keynote on your Mac.
Presentations you create on the web using Keynote for iCloud are automatically available in Keynote on your Mac or iOS devices that are set up to use iCloud—and vice versa: If you create a presentation using Keynote on an iOS device or a Mac, the presentation appears automatically on the web in Keynote for iCloud.
Make sure your iCloud account is upgraded to use iCloud Drive and that you’re signed in using your Apple ID.
On your Mac, go to iCloud.com and sign in using the same Apple ID.
Click Keynote.
See Keynote for iCloud Help for more information about using Keynote for iCloud.
Here are a few things to keep in mind about using iCloud to manage your presentations across devices:
If you edit and then close a presentation when you’re not connected to the Internet, the word “Syncing” appears below the presentation thumbnail in the Open dialog on your Mac. The next time you connect to the Internet, the edited presentation is saved to iCloud.
If you edit a document on more than one computer or device at the same time, you will see conflicts. Make sure the app has had time to save your changes to iCloud before editing the same presentation on another device. If you do get a conflict, you can choose to preserve any or all of the presentation versions.
If a presentation is shared with collaborators and is open in Keynote on your Mac, it’s periodically updated with the changes made to it on the web. For this reason, it’s best not to edit the presentation on your Mac while others are editing it on the web because the presentation may become out of sync.
If you delete a presentation, it’s deleted from iCloud and from Keynote on all your devices.
If you use folders to organize your presentations, the same folder organization applies on all your devices.
If you add a password to a presentation on one device, the password is required to open the presentation on all your devices.
If you’re using older versions of Keynote and OS X on other computers, or haven’t upgraded your iCloud account to use iCloud Drive, syncing won’t work in all cases. See this Apple Support article for more information.